Knuckle Fixture Tenon Mounts
A slipfitter adapter that lets a floodlight with a 1/2 inch knuckle mount on any 2-3/8 inch OD tenon.
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Many floodlights come with a 1/2 inch threaded knuckle meant for a junction box or wall, not a pole. The knuckle fixture tenon mount (LS-P4025D) closes that gap. It slides over a 2-3/8 inch OD tenon like a slipfitter and gives the knuckle a threaded point to lock into, so you can aim the head where you need it. Use it on a pole top tenon, a tenon adaptor, a bull horn arm or a wall-mounted tenon. It comes in black, bronze, US green and white. Thread the knuckle in and set the aim before you snug the mount down on the tenon. Browse LED flood and area lights that use a knuckle mount.
Shop Knuckle Fixture Tenon Mounts
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Knuckle Fixture Tenon MountKnuckle Fixture Tenon Mount
$95.98 Select options This product has multiple variants. The options may be chosen on the product page
Does Your Fixture Need a Knuckle Tenon Mount?
Check the back of the fixture first. The bracket type decides the part.
- Knuckle, yoke or slipfitter. A threaded swivel knuckle needs this mount. A U-shaped yoke needs a yoke tenon mount, and a slipfitter goes straight on the tenon.
- Confirm 1/2 inch. This mount is listed for a 1/2 inch knuckle. Larger knuckles will not thread in.
- Confirm the tenon. It fits tenons with a 2-3/8 inch OD, the size found on our tenon adaptors, bull horns and pole mounts.
- Lock the aim. Knuckles can drift in high wind if they are left loose, so tighten the knuckle lock after aiming.
U-bracket floodlights use the yoke fixture tenon mount instead.
Knuckle Tenon Mounts Questions
It is made for fixtures with a 1/2 inch knuckle. Check the fixture spec sheet, since some larger floods use a bigger knuckle or a yoke instead.
It fits over tenons with a 2-3/8 inch outside diameter. That covers standard pole top tenons, our round and square tenon adaptors, bull horn tenons and wall-mounted tenons of that size.
Yes. Put a bull horn on the pole top and add one knuckle tenon mount to each vertical tenon. Two, three and four-fixture bull horns are available.
Black, bronze, US green and white. Match the fixture housing or the pole so it does not stand out.
Yes. The flood, its knuckle and the tenon mount all add to the effective projected area the pole carries in wind. Add the flood’s EPA from its spec sheet to everything else on the pole and confirm the total is at or below the pole’s rated EPA for your wind speed. Our pole selection guide lists the steps in order.
Usually. LED floods do without the ballast and heavy internal reflector of a discharge lamp, so they tend to weigh less, and lighter heads put less strain on the knuckle and pole when the wind picks up. Our overview of LED light pole fixtures covers the other differences.
Pole Mounting Guides and Resources
How to choose a pole: pick the fixture and bracket, look up the fixture EPA, then match pole height to the wind load at your site.
What a fixture EPA wind rating means and when it decides which pole, arm and fixture combination will work.
Why lighter, flatter LED fixtures changed the wind load that poles and arms have to carry.
A step-by-step checklist for a complete light pole order, from pole type and height to shaft size and wall gauge.
Related categories: light pole accessories | yoke fixture tenon mounts | curved bull horns for floodlights | vertical pole mount | horizontal pole mount
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