Key Clamp Male Swivel Part for 48.3mm Tube, Through Ring with Lug, Galvanised, Size D

This is the male half of the key clamp swivel: a ring that clamps on a 48.3mm post with one flat lug that a female part, a bracket or an infill panel is bolted or riveted to. The post passes straight through the ring and one grub screw locks it at any height. The lug has a single hole for a rivet or bolt, so the part on it can pivot. Paired with a female part it makes a single swivel for a sloping rail; on its own it is a simple, neat way to fix mesh, sheet or board infill to a post. It is malleable cast iron with a galvanised finish for indoor and outdoor use. The price shown is for one part, with a minimum order of 10.

What it is for

The post half of a swivel. With a female part riveted to its lug, it makes a joint that turns about 85° either side of straight, so a rail can meet a post at whatever slope a ramp or stair needs.

Fixing infill panels. Mesh panels, sheet guards and boards with a tab or strap can be bolted straight to the lug, at any height on the post, without drilling the tube.

Build your own joints. Buying the halves separately lets you combine them as you need, or replace one half of a damaged swivel.

No welding. The ring fits with a hex key; only a rivet or bolt is needed at the lug.

Where it is used

Sloping handrails on access ramps and external steps, mesh infill on garden and yard fences, sheet and mesh machine guards, sign and board mounting on posts, and adjustable frames and canopies built from 48.3mm tube.

Specifications

Limits to know before you buy

This part is not designed to take lateral loads: the lug holds a panel or a swivel, not a sideways push. Tubes cannot be joined inside the ring. No load rating is published; where a rail must carry a set load, ask a structural engineer to check the design.

Which swivel part do you need?

How many do you need?

One male part for each rail end or panel that fixes to a post at that point. A ramp handrail with a sloping rail between two posts needs two male and two female parts. A mesh panel fixed top and bottom to each post needs two per post.

Choosing the right size

Key clamps are sized by the tube's outside diameter. 48.3mm is standard scaffold tube, often sold as 1½" or 40mm nominal bore. Measure across the tube: this part will not grip 42.4mm or 60.3mm tube. Other sizes of the same part:

• 26.9mm male swivel part
• 33.7mm male swivel part
• 42.4mm male swivel part

Fitting and care

Slide the ring onto the post, set the height and the direction of the lug, and tighten the grub screw with a 5/16" hex key. Fit the female part's fork or the panel tab over the lug, line up the holes and fit a rivet or a bolt with a locking nut. Check the joint after the first week and once a year, and 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.