RS PRO Galvanised Steel Hex, Hex Bolt, M20 x 40mm

Introducing the range of Hex Head Set Screws, a high-quality fastener solution for heavyweight applications such as maintenance, machinery, engines, manufacturing and much more. Each fastener is made from steel with a galvanised coating, making them much more cost-effective than their stainless-steel counterparts, while still offering a high level of protection against surface rust and oxidisation.

Hex bolts or machine bolts are designed to connect metal to metal, wood to wood or metal to wood, and offer increased rigidity and load-bearing capacity making them ideal for use in heavy duty applications. It is generally used with a pre-drilled through hole and can be used with a nut for additional anchoring. Hex bolts are most commonly used for:

• Carpentry construction like decking, railings and small frames


• Timber construction to support timber framing for houses


• Mounting heavy items onto walls


• Building work and construction