Stainless Steel Hex-Head Woodscrews also known as Lag Bolts. These are used to support heavier loads than a standard woodscrew and require a pilot hole unlike some woodscrews, hex head woodscrews are more suitable than a standard woodscrew when a large amount of torque is required.
Hexagonal head woodscrew 5 x 30mm (A2 stainless Steel) DIN571
5 x 50 mm Hexagonal head woodscrew (A2 stainless Steel) DIN571
Hexagonal head woodscrew 5 x 50mm (A4 stainless Steel) DIN571