U-Bolt M6 x39 mm Thread, 64 mm Inside Diam, 72 mm Inside Height Galvanised


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U-Bolt M6 x39 mm Thread, 64 mm Inside Diam, 72 mm Inside Height Galvanised

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U-Bolt M6 x39 mm Thread, 64 mm Inside Diam, 72 mm Inside Height Galvanised

Includes two nuts per leg

Graphskill standard U-Bolt

Galvanised - A duller finish than BZP, typically 50 microns thick covering of Zinc and therefore provides much more protection suitable for many out door applications

All Measurements in mm

Inside Diameter : 64

Inside Height : 72

Leg Centers : 70

Leg Length : 40

Material : Galvanised

Pipe Nominal Bore :

Suggested Pipe OD : 62

Thread length : 39

Thread Size : M6

Our manufacturing tolerances are + / - 1 mm)

We use roll threading so the diameter of the bar is usually less than the thread size. Please ask if unsure

If using your own nuts on galvanised products please ensure they are tapped oversize to allow for the galvanised layer
Data sheet
Material Galvanised
Pipe OD 62
Inside Diameter 64
Inside Height 72
Thread Size M6
Leg Centers 70
Leg Length 40
Thread length 39
Product Type U-Bolt
Design Graphskill Standard
Delivery Details

We offer a range of delivery options based on the weight of the overall shopping cart and your specific location.

After adding the products to the shopping cart you will see a range of options based on delivery to mainland UK. Change country and the delivery options will be modified for your address.

  • Please be aware of our latest order times for same-day dispatch (2 PM)
  • We ship orders every weekday
  • Be aware of current stock levels (shown on the product page and the checkout page)
  • Be aware of our shipping terms and conditions (CLICK HERE) which basically state we may upgrade delivery at our discretion and that we are not responsible for late deliveries outside of our control


Every product page and the cart shows the current stock level. Our normal practice is to only ship the full order unless the shortfall is our fault.

If you can see we are short of stock and want to receive what we have as soon as possible, and the remainder when they are available, then add this product to the shopping cart also (UK Only):


Reviews (3)

Rated 4.33 on the scale 1 - 5 based on 3 customer reviews
Verified purchase

M6 U bolts

Threads a bit rough, difficult to use non supplied m6 bolts, otherwise good

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Reply from U-Bolts-R-Us:
When using galvanised bolts you always have to use tapped oversized nuts. You do have to be careful if using nuts that we do not supply that they are tapped oversize

Reply to Keith regarding threads

We have discussed the problem of the threads with Keith and concluded that the threads were not at fault. Keith was using a non tapped galvanised handwheel. With galvanized threads you can only use tapped oversize galvanised nuts as the galvanised layer effectively alters the size of the thread. Whilst this is well known in industry, perhaps less so else where. So we have now added a comment to that effect in each product description

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64 mm diameter U bolts

Fiat have such fat roof bars that I needed to buy new U bolts to attach our cycle carriers. U-bolts-R-us advertised the very thing I needed so I ordered 12. They didn't have enough in stock but made the others very promptly. When they arrived, 5 of them are good and the other 7 are not fit for purpose. I think the poor ones must be the newly manufactured ones. The problem with them seems to be that the thread is full of the galvanising so they will not take M6 handwheels as required. I have ordered an M6 thread cleaning die on ebay and hope that will solve the problem.

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