Company Information

Who owns and operates this website?


This site is owned by Graphskill Ltd

The head office is located at:

Phoenix Works, Birks Road Industrial Estate

Birks Road, Cleator Moor

Cumbria, CA25 5HU

United Kingdom


Photography & Images

Please note that all photography and images are representative. Please check the dimensions of each product as given in the product description to ensure it matches your needs

Software Credits

Concept and production:

This Web site was created using Thirty Bees™ open-source software

Who are Graphskill / U-Bolts-R-Us?

About Us

Who we are

Graphskill is a component manufacturer with its core business in the pipework industry, but with customers in a variety of other industries ranging from communications to sanitary ware.

We work with distributors and component suppliers across the world but also work directly with clients such as Racal, AMEC, ICI, Kvaerner, Powergen, Balfour Beatty, McAlpine, John Laing, North West Water, Klargester, Armitage Shanks and BNFL.

Most of our business centres around supply u-bolts, hangers, clips and associated items, however our technical design engineers also work closely with customers in creating bespoke products.

Our lead times and reliability are the best in the business and we have efficient systems that will provide you with prompt quotes for both stocked and bespoke products. We work to very high quality standards with materials in various grades of stainless steel, carbon steel and non-ferrous metals.

Many customers make us their first choice, knowing we deliver a quality product and service that puts them, the customer, first. Reliability is our hallmark. We have a professional and dedicated workforce who are committed to fulfiling the quality and delivery promised, no matter how short the lead-time.

We are sure once you have experienced the products and services Graphskill can offer, you will stay with us for many years, just as our existing customers have.


The Company was first registered in 1976, with its main purpose being a Design Office. Two years later, the function was increased to General Engineering, servicing the local Engineering Companies in the county. We found our niche in the manufacture of pipe support ancillaries, such as U Bolts, Pipeclips, Eyerods, etc., supplying the Contract Engineers on the British Nuclear Fuels Limited sites at Sellafield, Springfield, Dounreay, etc. Since the early 1990's we have built up a customer base that covers the whole of the UK and diversified our product range to suit other markets than that of the Piping Industry. 

Graphskill is the Comany name - Our Static website ican be accessedd here:

U-Bolts-R-Us is the online web store and can be accessed here:

Graphskill Ltd Website privacy notice


This privacy notice provides you with details of how we collect and process your personal data through your use of our sites [,, Telephone & Email Communications]

By providing us with your data, you warrant to us that you are over 13 years of age.

Graphskill are the data controller and we are responsible for your personal data (referred to as “we”, “us” or “our” in this privacy notice).

Contact Details

Our full details are:

Full name of legal entity: Graphskill Ltd

Email address:

Postal address: Graphskill LTtd, Birks Road, Cleator Moor, Cumbria, CA25 5HU

Telephone number: 01946 811748

It is very important that the information we hold about you is accurate and up to date. Please let us know if at any time your personal information changes by emailing us at OR change them directly in your website account



Personal data means any information capable of identifying an individual. It does not include anonymised data.

We may process the following categories of personal data about you:


  •          Communication Data that includes any communication that you send to us whether that be through the contact form on our website, through email, text, social media messaging, social media posting or any other communication that you send us. We process this data for the purposes of communicating with you, for record keeping and for the establishment, pursuance or defense of legal claims. Our lawful ground for this processing is our legitimate interests which in this case are to reply to communications sent to us, to keep records and to establish, pursue or defend legal claims.


  •          Customer Data that includes data relating to any purchases of goods and/or services such as your name, title, billing address, delivery address email address, phone number, contact details, purchase details and your card details (We do not store the details, they go directly to GDPR compliant PayPal). We process this data to supply the goods and/or services you have purchased and to keep records of such transactions. Our lawful ground for this processing is the performance of a contract between you and us and/or taking steps at your request to enter into such a contract.


  •          User Data that includes data about how you use our website and any online services together with any data that you post for publication on our website or through other online services. We process this data to operate our website and ensure relevant content is provided to you, to ensure the security of our website, to maintain back- ups of our website and/or databases and to enable publication and administration of our website, other online services and business. Our lawful ground for this processing is our legitimate interests which in this case are to enable us to properly administer our website and our business.


  •          Technical Data that includes data about your use of our website and online services such as your IP address, your login data, details about your browser, length of visit to pages on our website, page views and navigation paths, details about the number of times you use our website, time zone settings and other technology on the devices you use to access our website. The source of this data is from our analytics tracking system. We process this data to analyse your use of our website and other online services, to administer and protect our business and website, to deliver relevant website content and advertisements to you and to understand the effectiveness of our advertising.  Our lawful ground for this processing is our legitimate interests which in this case are to enable us to properly administer our website and our business and to grow our business and to decide our marketing strategy.


  •          Marketing Data – We do not do marketing.


Sensitive Data

We do not collect any Sensitive Data about you. Sensitive data refers to data that includes details about your race or ethnicity, religious or philosophical beliefs, sex life, sexual orientation, political opinions, trade union membership, information about your health and genetic and biometric data. We do not collect any information about criminal convictions and offences.

Where we are required to collect personal data by law, or under the terms of the contract between us and you do not provide us with that data when requested, we may not be able to perform the contract (for example, to deliver goods or services to you). If you don’t provide us with the requested data, we may have to cancel a product or service you have ordered but if we do, we will notify you at the time.

We will only use your personal data for a purpose it was collected for or a reasonably compatible purpose if necessary. For more information on this please email us at In case we need to use your details for an unrelated new purpose we will let you know and explain the legal grounds for processing.

We may process your personal data without your knowledge or consent where this is required or permitted by law.

We do not carry out automated decision making or any type of automated profiling.




We may collect data about you by you providing the data directly to us (for example by filling in forms on our site or by sending us emails). We may automatically collect certain data from you as you use our website by using cookies and similar technologies. Please see our cookie policy for more details about this

We may receive data from third parties such as analytics providers such as Google based outside the EU, advertising networks such as Facebook based outside the EU, such as search information providers such as Google based outside the EU, providers of technical, payment and delivery services, such as data brokers or aggregators.


We do not do any direct marketing to our customers. We will never send you newsletters, offers or any other unsolicited emails. We will not pass your data on to third parties for marketing purposes



We may have to share your personal data with the parties set out below:


  •           U-Bolts-R-Us and Graphskill are the same company. Graphskill is the corporate name, U-bolts-r-us is the ecommerce website name. We would not class these as separate entities
  •           Service providers who provide IT and system administration services.
  •           Professional advisers including accountants, lawyers, bankers, auditors and insurers
  •           Government bodies that require us to report processing activities.
  •           In order to run our website review system, online customers will be contacted by our own internal review system (This is classed as legitimate interest)

We require all third parties to whom we transfer your data to respect the security of your personal data and to treat it in accordance with the law. We only allow such third parties to process your personal data for specified purposes and in accordance with our instructions.




Countries outside of the European Economic Area (EEA) do not always offer the same levels of protection to your personal data, so European law has prohibited transfers of personal data outside of the EEA unless the transfer meets certain criteria.

Some our third parties service providers are based outside the European Economic Area (EEA) so their processing of your personal data will involve a transfer of data outside the EEA.

Whenever we transfer your personal data out of the EEA, we do our best to ensure a similar degree of security of data by ensuring at least one of the following safeguards is in place:


  •           We will only transfer your personal data to countries that the European Commission have approved as providing an adequate level of protection for personal data by; or
  •           Where we use certain service providers, we may use specific contracts or codes of conduct or certification mechanisms approved by the European Commission which give personal data the same protection it has in Europe; or
  •            If we use US-based providers that are part of EU-US Privacy Shield, we may transfer data to them, as they have equivalent safeguards in place.

If none of the above safeguards is available, we may request your explicit consent to the specific transfer. You will have the right to withdraw this consent at any time. 


We have put in place security measures to prevent your personal data from being accidentally lost, used, altered, disclosed, or accessed without authorisation. We also allow access to your personal data only to those employees and partners who have a business need to know such data. They will only process your personal data on our instructions and they must keep it confidential.

We have procedures in place to deal with any suspected personal data breach and will notify you and any applicable regulator of a breach if we are legally required to.




We will only retain your personal data for as long as necessary to fulfil the purposes we collected it for, including for the purposes of satisfying any legal, accounting, or reporting requirements.

When deciding what the correct time is to keep the data for we look at its amount, nature and sensitivity, potential risk of harm from unauthorised use or disclosure, the processing purposes, if these can be achieved by other means and legal requirements.

For tax purposes the law requires us to keep basic information about our customers (including Contact, Identity, Financial and Transaction Data) for six years after they stop being customers.

In some circumstances we may anonymise your personal data for research or statistical purposes in which case we may use this information indefinitely without further notice to you.




Under data protection laws you have rights in relation to your personal data that include the right to request access, correction, erasure, restriction, transfer, to object to processing, to portability of data and (where the lawful ground of processing is consent) to withdraw consent.


You can see more about these rights at:

If you wish to exercise any of the rights set out above, please email us at

You will not have to pay a fee to access your personal data (or to exercise any of the other rights). However, we may charge a reasonable fee if your request is clearly unfounded, repetitive or excessive or refuse to comply with your request in these circumstances.


We may need to request specific information from you to help us confirm your identity and ensure your right to access your personal data (or to exercise any of your other rights). This is a security measure to ensure that personal data is not disclosed to any person who has no right to receive it. We may also contact you to ask you for further information in relation to your request to speed up our response.


We try to respond to all legitimate requests within one month. Occasionally it may take us longer than a month if your request is particularly complex or you have made a number of requests. In this case, we will notify you.


If you are not happy with any aspect of how we collect and use your data, you have the right to complain to the Information Commissioner’s Office (ICO), the UK supervisory authority for data protection issues ( We should be grateful if you would contact us first if you do have a complaint so that we can try to resolve it for you.



This website may include links to third-party websites, plug-ins and applications. Clicking on those links or enabling those connections may allow third parties to collect or share data about you. We do not control these third-party websites and are not responsible for their privacy statements. When you leave our website, we encourage you to read the privacy notice of every website you visit.



You can set your browser to refuse all or some browser cookies, or to alert you when websites set or access cookies. If you disable or refuse cookies, please note that some parts of this website may become inaccessible or not function properly. For more information about the cookies we use, please see

Reviews - are they real?

Yes of course. Our reviews are collected by us directly so no eternal companies are involved. 

Emails are sent only to cutomers who have puchased the items to request a review,although anyone can leave a review at any time. All reviews are moderated before publishing

See our reviews here:

Do you have a cookie policy?


What's a cookie?

•A "cookie" is a piece of information that is stored on your computer's hard drive and which records how you move your way around a website so that, when you revisit that website, it can present tailored options based on the information stored about your last visit. Cookies can also be used to analyse traffic and for advertising and marketing purposes.

•Cookies are used by nearly all websites and do not harm your system.

If you want to check or change what types of cookies you accept, this can usually be altered within your browser settings. You can block cookies at any time by activating the setting on your browser that allows you to refuse the setting of all or some cookies. However, if you use your browser settings to block all cookies (including essential cookies) you may not be able to access all or parts of our site.

How do we use cookies?

•We use cookies to track your use of our website. This enables us to understand how you use the site and track any patterns with regards how you are using our website. This helps us to develop and improve our website as well as products and / or services in response to what you might need or want.

•Cookies are either:

- Session cookies: these are only stored on your computer during your web session and are automatically deleted when you close your browser – they usually store an anonymous session ID allowing you to browse a website without having to log in to each page but they do not collect any personal data from your computer; or

- Persistent cookies: a persistent cookie is stored as a file on your computer and it remains there when you close your web browser. The cookie can be read by the website that created it when you visit that website again. [We use persistent cookies for Google Analytics.]

•Cookies can also be categorised as follows:

- Strictly necessary cookies: These cookies are essential to enable you to use the website effectively, such as when buying a product and / or service, and therefore cannot be turned off. Without these cookies, the services available to you on our website cannot be provided. These cookies do not gather information about you that could be used for marketing or remembering where you have been on the internet.

- Performance cookies: These cookies enable us to monitor and improve the performance of our website. For example, they allow us to count visits, identify traffic sources and see which parts of the site are most popular.

- Functionality cookies: These cookies allow our website to remember choices you make and provide enhanced features. For instance, we may be able to provide you with news or updates relevant to the services you use. They may also be used to provide services you have requested such as viewing a video or commenting on a blog. The information these cookies collect is usually anonymised.

However, you may prefer to disable cookies on this site and on others. The most effective way to do this is to disable cookies in your browser. We suggest consulting the Help section of your browser or taking a look at the About Cookies website which offers guidance for all modern browsers

Website Disclaimer

Website disclaimer

1.       Introduction

1.1    This disclaimer shall govern your use of our website.

1.2    By using our website, you accept this disclaimer in full; accordingly, if you disagree with this disclaimer or any part of this disclaimer, you must not use our website.

1.3    Our website uses cookies; by using our website or agreeing to this disclaimer, you consent to our use of cookies in accordance with the terms of our [privacy and cookies policy].

2.       Credit

2.1    This document was created using a template from SEQ Legal (

3.       Copyright notice

3.1    Copyright (c) [2017] [Graphskill Ltd].

3.2    Subject to the express provisions of this disclaimer:

(a)    we, together with our licensors, own and control all the copyright and other intellectual property rights in our website and the material on our website; and

(b)    all the copyright and other intellectual property rights in our website and the material on our website are reserved.

4.       Licence to use website

4.1    You may:

(a)    view pages from our website in a web browser;

(b)    download pages from our website for caching in a web browser; and

(c)    print pages from our website,

        subject to the other provisions of this disclaimer.

4.2    Except as expressly permitted by Section 4.1 or the other provisions of this disclaimer, you must not download any material from our website or save any such material to your computer.

4.3    You may only use our website for [your own personal and business purposes], and you must not use our website for any other purposes.

4.4    Unless you own or control the relevant rights in the material, you must not:

(a)    republish material from our website (including republication on another website);

(b)    sell, rent or sub-license material from our website;

(c)    show any material from our website in public;

(d)    exploit material from our website for a commercial purpose; or

(e)    redistribute material from our website.

4.5    We reserve the right to restrict access to areas of our website, or indeed our whole website, at our discretion; you must not circumvent or bypass, or attempt to circumvent or bypass, any access restriction measures on our website.

5.       Acceptable use

5.1    You must not:

(a)    use our website in any way or take any action that causes, or may cause, damage to the website or impairment of the performance, availability or accessibility of the website;

(b)    use our website in any way that is unlawful, illegal, fraudulent or harmful, or in connection with any unlawful, illegal, fraudulent or harmful purpose or activity;

(c)    use our website to copy, store, host, transmit, send, use, publish or distribute any material which consists of (or is linked to) any spyware, computer virus, Trojan horse, worm, keystroke logger, rootkit or other malicious computer software;

(d)    conduct any systematic or automated data collection activities (including without limitation scraping, data mining, data extraction and data harvesting) on or in relation to our website without our express written consent;

(e)    access or otherwise interact with our website using any robot, spider or other automated means [ except for the purpose of [search engine indexing];

(f)    violate the directives set out in the robots.txt file for our website; or

(g)    use data collected from our website for any direct marketing activity (including without limitation email marketing, SMS marketing, telemarketing and direct mailing).

5.2    You must not use data collected from our website to contact individuals, companies or other persons or entities.

5.3    You must ensure that all the information you supply to us through our website, or in relation to our website, is [true, accurate, current, complete and non-misleading].

6.       Limited warranties

6.1    We do not warrant or represent:

(a)    the completeness or accuracy of the information published on our website;

(b)    that the material on the website is up to date; or

(c)    that the website or any service on the website will remain available.

6.2    We reserve the right to discontinue or alter any or all of our website services, and to stop publishing our website, at any time in our sole discretion without notice or explanation; and save to the extent expressly provided otherwise in this disclaimer, you will not be entitled to any compensation or other payment upon the discontinuance or alteration of any website services, or if we stop publishing the website.

6.3    To the maximum extent permitted by applicable law and subject to Section 7.1, we exclude all representations and warranties relating to the subject matter of this disclaimer, our website and the use of our website.

7.       Limitations and exclusions of liability

7.1    Nothing in this disclaimer will:

(a)    limit or exclude any liability for death or personal injury resulting from negligence;

(b)    limit or exclude any liability for fraud or fraudulent misrepresentation;

(c)    limit any liabilities in any way that is not permitted under applicable law; or

(d)    exclude any liabilities that may not be excluded under applicable law.

7.2    The limitations and exclusions of liability set out in this Section 7 and elsewhere in this disclaimer:

(a)    are subject to Section 7.1; and

(b)    govern all liabilities arising under this disclaimer or relating to the subject matter of this disclaimer, including liabilities arising in contract, in tort (including negligence) and for breach of statutory duty, except to the extent expressly provided otherwise in this disclaimer.

7.3    To the extent that our website and the information and services on our website are provided free of charge, we will not be liable for any loss or damage of any nature.

7.4    We will not be liable to you in respect of any losses arising out of any event or events beyond our reasonable control.

7.5    We will not be liable to you in respect of any business losses, including (without limitation) loss of or damage to profits, income, revenue, use, production, anticipated savings, business, contracts, commercial opportunities or goodwill.

7.6    We will not be liable to you in respect of any loss or corruption of any data, database or software.

7.7    We will not be liable to you in respect of any special, indirect or consequential loss or damage.

7.8    You accept that we have an interest in limiting the personal liability of our officers and employees and, having regard to that interest, you acknowledge that we are a limited liability entity; you agree that you will not bring any claim personally against our officers or employees in respect of any losses you suffer in connection with the website or this disclaimer (this will not, of course, limit or exclude the liability of the limited liability entity itself for the acts and omissions of our officers and employees).

8.       Variation

8.1    We may revise this disclaimer from time to time.

8.2    The revised disclaimer shall apply to the use of our website from the time of publication of the revised disclaimer on the website.

9.       Severability

9.1    If a provision of this disclaimer is determined by any court or other competent authority to be unlawful and/or unenforceable, the other provisions will continue in effect.

9.2    If any unlawful and/or unenforceable provision of this disclaimer would be lawful or enforceable if part of it were deleted, that part will be deemed to be deleted, and the rest of the provision will continue in effect.

10.    Law and jurisdiction

10.1  This disclaimer shall be governed by and construed in accordance with English law.

10.2  Any disputes relating to this disclaimer shall be subject to the [exclusive] OR [non-exclusive] jurisdiction of the courts of England.

11.    Statutory and regulatory disclosures

11.1  Our VAT number is GB257422067.

11.2 Company number 01249783

12.    Our details

12.1  This website is owned and operated by Graphskill Ltd.

12.2  We are registered in [England and Wales] under registration number 01249783, and our registered office is at Birks Road, Cleator Moor, Cumbria CA25 5HU.

12.3  Our principal place of business is at Birks Road, Cleator Moor, Cumbria CA25 5HU.

12.4  You can contact us:

(a)    by post, using the postal address [given above];

(b)    using our website contact form;

(c)    by telephone, on 01946 811748; or

(d)    by email,

How do we contact you?



Or complete an online form by clicking HERE

Question about an existing order? Please log into your account and select the specific order.
At the bottom of the order there is a message box to use

  • Contact? - Before contacting us, please check our privacy policy. We are GDPR compliant. We never do marketing so your data is safe with us (Click Here To read)

  • Need support? Call us, we are happy to help you locate the correct products: 01946 811748 (Read Terms & Conditions Here First)

  • Phone Order? We are happy to take your order over the phone: 01946 811748 (Read Terms & Conditions Here First) - please note that we will still create an account for you online and you will need an email address, basically we do the typing for you. 

Company Address:

Graphskill Ltd / U-Bolts-R-Us
Birks Road
CA25 5HU
United Kingdom

Tel: 01946 811748

Din 571 is the standard for Hexagonal head wood screw.

Din 571 is the standard for Hexagonal head wood screw.

DIN 571 Specifications - Click Here To See Our Range

All measurements in millimeters (mm)

All information is strictly informative

Thread Size M4 M5 M6 M7 M8 M10 M12 M16 M20
ds Max. 4.00 5.00 6.00 7.00 8.00 10.00 12.00 16.00 20.00
Min. 3.52 4.52 5.52 6.42 7.42 9.42 11.30 15.30 19.30

Normal Size 2.8 3.5 4 5 5.5 7 8 10 13
Max. 3.10 3.88 4.38 5.38 5.88 7.45 8.45 10.45 13.90
Min. 2.50 3.13 3.63 4.63 5.13 6.55 7.55 9.55 12.10

Normal Size 7 8 10 12 13 17 19 24 30
Max 7.00 8.00 10.00 12.00 13.00 17.00 19.00 24.00 30.00
Min. 6.64 7.64 9.64 11.57 12.57 16.57 18.48 23.16 29.16
e Min. 7.50 8.63 10.89 13.07 14.2 18.72 20.88 26.17 32.95

Din 933 is the standard for Hexagonal Head Set Screws. 

Din 933 is the standard for Hexagonal Head Set Screws. 

DIN 933 Specifications - Click Here To See Our Range

DIN 986 - Specification for Hexagon Domed Cap Nut with Nylon Insert

DIN 986 - Specification for Hexagon Domed Cap Nut with Nylon Insert

DIN 986 Specifications - Click Here To See Our Range

All measurements in millimeters (mm)

Graphskill SUMS m h s e Thread Pitch
NUTS/A2SS/DOME-NYLOC-M4 2.9 9.6 7 7.66 0.7
NUTS/A2SS/DOME-NYLOC-M5 4.4 10.5 8 8.79 0.8
NUTS/A2SS/DOME-NYLOC-M6 4.9 12 10 11.05 1
NUTS/A2SS/DOME-NYLOC-M8 6.44 14 13 14.38 1.25
NUTS/A2SS/DOME-NYLOC-M10 8.04 18.1 16 18.9 1.5
NUTS/A2SS/DOME-NYLOC-M12 10.37 22.5 18 20.03 1.75
NUTS/A2SS/DOME-NYLOC-M16 14.1 27.5 24 26.75 2

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Quantity Based Discounts are applied automatically at the checkout and apply on a per line basis

Minimum QuantityDiscount Level 
50 10%
80 15%
100 20%
200 25%
500 30%
1000 35%
2000 40%