Metallics UB017 Bolts 3/8-16 X 2-1/4 X 1 U-Blt &Nt U (Bag 10)

The UB017 is a 3/8-16 U-bolt with a 1 inch inside width, so it wraps around a run measuring about 1 inch across the outside. Measure the actual outside diameter of your conduit or pipe, not its trade size, since trade sizes and OD rarely match. Thread length on the legs is 2-1/4 inches, which leaves room for a support channel, washer and the two hex nuts.

Nuts are included. Each UB017 U-bolt ships with two hex nuts, one per leg, and they are Grade A nuts per ASTM A563. Nothing else is supplied, so any washers, backing plate or strut channel for the mount has to be bought on its own.

Both legs are 3/8-16 UNC, right hand, cut to the ANSI/ASME B1.1 thread standard at 16 threads per inch. That is the common coarse 3/8 thread, so standard 3/8-16 nuts and washers thread on if you ever need extras or want to add a lock nut.

The UB017 is steel with a zinc finish, which handles dry interior and normally damp conditions and gives moderate protection in sheltered exterior work. For coastal exposure, wet process areas or anywhere with chemical washdown, a stainless or hot dip galvanized clamp is the better call; zinc plating will eventually rust through in those settings.

The U-bolt body is made to ASTM A307, the low carbon carbon steel bolt specification used for general fastening rather than structural or high strength connections. Nuts are ASTM A563 Grade A. Treat it as a support and clamping fastener for conduit, pipe and duct runs, not as a rigging or lifting eye.

Yes. The UB017 is flagged both Buy American compliant and ARRA compliant, which is what a public agency or federally funded project specification normally asks for on fasteners. Country of origin is listed as multiple, so if your submittal needs a single named origin, confirm it against the packaging on the lot you receive.

The UB017 is bagged in quantities of 10, and 10 each is the order minimum. Other sizes and quantities can be had by request if a job needs a different leg length or inside width.

Nut dimensions follow ASME B18.2.2, the standard for hex nuts, with a head width across flats of 0.551 to 0.563 inch and a height of 0.320 to 0.337 inch. That means a standard 9/16 inch wrench or socket drives them, which matters if you are torquing a lot of hangers overhead.

Yes, it is intended for electrical, plumbing, heating and air conditioning work, so the same bag covers conduit runs, pipe supports and duct or equipment anchoring. For an MRO stockroom that services all three trades, that makes it a single line item instead of three.