Key Clamp Short Tee for 33.7mm Tube, 90° Galvanised Fitting, Size B

The 33.7mm short tee builds neat, light handrails and fences from tube, with no welding. It joins a vertical post to a horizontal rail at 90°. The rail slides straight through the top barrel, the post pushes up into the socket underneath, and two grub screws lock both tubes in place. It suits 33.7mm outside diameter tube, a comfortable size to grip as a handrail and light enough for garden, school and allotment rails. It is malleable cast iron with a galvanised finish for outdoor use. The price shown is for one fitting, with a minimum order of 10.

Why use 33.7mm key clamps

Easy to grip. 33.7mm tube sits comfortably in the hand, so it suits handrails beside paths and steps where people hold on, not just lean.

Light and neat. At about 0.3 kg per fitting, it keeps a rail slim and tidy where 48.3mm scaffold-size fittings would look heavy.

No hot work. Everything goes together with a hex key: cut the tube, push it in, tighten two screws. There is no welding, no fumes and no damaged galvanising.

Adjustable and reusable. Set each post plumb and the rail level before you lock it, and change the layout later by loosening the screws.

Where it is used

Handrails beside level paths and landings, school and nursery rails, allotment and garden fences, cycle stand frames, light barriers in car parks, stable and paddock rails, and shop and workshop frames.

Specifications

Which 33.7mm fitting goes where

How many do you need?

For a straight rail with posts at 1.5 metre centres, you need one short tee per intermediate post for the top rail, plus one per end post if there is a mid rail.

End posts on a single rail take a 90° elbow instead of a short tee.

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 tee will not grip 32mm or 42.4mm tube. Other sizes of the same short tee:

• 26.9mm short tee for light frames
• 42.4mm short tee for guardrails
• 48.3mm short tee for scaffold-size tube
• 60.3mm short tee for heavy-duty barriers

Tubes cannot be joined inside the top barrel. Where a rail joint falls over a post, use the long tee instead.

Fitting and care

Cut tube ends square and deburr them so the tube slides fully home. Push the post up into the socket, pass the rail through the barrel, set the post plumb and the rail level, then tighten each grub screw firmly with a 1/4" hex key. Check the screws after the first week and once a year after that. Touch up scratched galvanising with zinc-rich paint. Spare 33.7mm setscrews are sold separately.

Frequently asked questions

Ordering and delivery

Order 10 or more online, with Express UK Delivery and same-day dispatch on orders before 2pm, Monday to Friday. For a full parts list or a larger job, call 01744 520 110 or email sales@industrialsuppliesco.co.uk and we will confirm availability and delivery before you order.