Gold Key Clamp Setscrew for 42.4mm Fittings, 3/8in BSP Hex Socket Grub Screw

A gold finish hex socket setscrew for 42.4mm key clamp fittings, for replacing a lost, worn or damaged grub screw. It is a 3/8" BSP headless setscrew of the standard length used in 42.4mm (size C) fittings, tightened with a 5/16" hex key. Every key clamp fitting is already supplied with its setscrews fitted, so these are for repairs, site spares and stores, or where you want the screws to stand out in the gold finish. The same 3/8" screw is used in 48.3mm (size D) fittings. The price shown is for one setscrew, with a minimum order of 10.

Why use a gold setscrew

Easy to see. The gold colour stands out against grey galvanised or black fittings, so a missing or loose screw is quick to spot on an inspection.

A lost screw stops the job. Setscrews get dropped on site, rolled into gaps and lost when frames are taken down. A few spares in the van keep a guard rail or frame going without waiting for a delivery.

Replace worn or damaged screws. A screw with a rounded hex socket or damaged thread will not tighten properly. Swap it for a new one to keep the joint secure.

Reusing old fittings. When fittings are recovered from a frame that has been taken down, fresh setscrews make them ready to use again.

Where it is used

Repairs and maintenance on 48.3mm and 42.4mm key clamp guard rails, handrails, barriers and frames, site and maintenance stock for facilities teams and installers, and refurbishing recovered fittings.

Specifications

Which setscrew do you need?

How many do you need?

One for each screw you are replacing. Most fittings take one to four setscrews, so a pack of ten covers a handful of repairs. For a stores kit, keep at least as many spares as the largest fitting you use.

Fitting and care

Clean any dirt or old thread debris from the boss of the fitting. Start the setscrew by hand to make sure the thread runs true, then tighten it firmly with a 5/16" hex key until it bites into the tube. Do not overtighten with an extension bar, as that can split the casting. Check screws after the first week and once a year after that.

Frequently asked questions

Ordering and delivery

Order 10 or more online, with Express UK Delivery to your site and same-day dispatch on orders before 2pm, Monday to Friday. For fittings and spares together, call 01744 520 110 or email sales@industrialsuppliesco.co.uk and we will confirm availability and delivery before you order.