Key Clamp Single Lugged Bracket for 33.7mm Tube, Galvanised

The single lugged bracket gives a tube one flat fixing tab, so a board, sign or panel can be bolted to it lying almost flush against the tube. The barrel slides onto the 33.7mm tube and one grub screw locks it at any height and angle; the lug has a 10mm hole for a bolt or rivet. It is the simple way to fix plywood, signs, mesh frames and display panels to a tube structure without drilling the tube. It is malleable cast iron with a galvanised finish for indoor and outdoor use. The price shown is for one bracket, with a minimum order of 10.

Why use a single lugged bracket

Panels sit close to the tube. The lug is offset to lie almost level with the face of the tube, so a flat board bolted to it sits tight against the frame instead of standing off on a bracket.

No drilling the tube. Drilling a galvanised tube weakens it and breaks the coating. The bracket clamps on, so the tube stays whole and rust-free.

Adjustable. Until the grub screw is tightened, the bracket slides along the tube and turns round it, so the lug can be lined up exactly with the holes in the panel.

Low cost per fixing. One screw and one bolt per point, with no welding or special tools.

Where it is used

Sign boards on tube posts, plywood and sheet back panels on workshop frames, display boards and noticeboards, kick plates and toe boards on platforms, mesh and sheet panels on guards and enclosures, and shelving backs.

Specifications

Which bracket do you need?

How many do you need?

Two brackets per tube for most boards, one near the top and one near the bottom. A sign on one post needs two; a board spanning two posts needs four.

Choosing the right size

Key clamps are sized by the tube's outside diameter. 33.7mm tube is often sold as 1" or 25mm nominal bore. Measure across the tube before ordering: this fitting will not grip 26.9mm or 42.4mm tube. The same galvanised fitting is made for 42.4mm and 48.3mm tube.

Fitting and care

Slide the brackets onto the tube before anything above blocks the tube end. Offer up the board, mark and drill its holes to match the lugs, then bolt it on and tighten the grub screws with a 1/4" hex key. Use washers on soft boards. Check the screws and bolts after the first week and once a year. Touch up scratched galvanising with zinc-rich paint.

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 a larger job, call 01744 520 110 or email sales@industrialsuppliesco.co.uk and we will confirm availability and delivery before you order.