Metallics UB08 Bolts 1/4-20 X 3 X 1-3/4 U-Blt &Nt U (Bag 10)

The UB08 is a 1/4-20 U-bolt with a 3 inch leg length and a 1-3/4 inch inside width, so it clamps round stock or pipe whose outside diameter fits within that 1-3/4 inch opening. Measure the actual OD of the pipe or conduit, not the nominal trade size, since insulated or oversized runs will not close down inside the bend.

Nuts are included. Each UB08 ships with 2 hex nuts, one per threaded leg, so nothing else is needed to make up the clamp other than whatever backing plate or strut your detail calls for.

The UB08 is steel with a zinc finish, which handles indoor and normally dry or occasionally damp service. For continuous wet exposure, coastal air, or chemical environments, zinc plating is the wrong choice and a stainless U-bolt is the right call.

Both the Buy American and ARRA compliance flags on the UB08 are marked C. Country of origin is listed as multiple, so for a federally funded project confirm the origin of the specific lot against your contract clause before it goes in the wall.

Yes. The UB08 is specified for electrical, plumbing, heating and air conditioning work, which is exactly the conduit, pipe and tubing hanging and anchoring duty a mechanical or electrical contractor uses a U-bolt for. It is a clamp around the pipe, not a hanger that carries the pipe on its own, so it still needs a strut, angle or plate to bolt through.

Yes, the Metallics UB series runs beyond the UB08's 1/4-20 by 3 by 1-3/4 configuration, and other sizes and quantities can be had by request. Give the thread size, leg length and inside width you need and it can be matched within the series.

The UB08 is bagged 10 per pack with an order minimum of 10 each, so it is sold in full bag quantities rather than singles. A bag of 10 weighs about 408 g.

The hex nuts measure 0.428 to 0.438 in. across the flats with a height of 0.212 to 0.226, which is standard 1/4-20 hex nut geometry. A 7/16 inch wrench or socket is the right tool. Threads are right hand.