Stainless steel two piece clamps, also known as strut straps, are used with strut to support conduit or pipe. Strut straps are designed for use with standard sized channel and can be installed for either vertical or horizontal runs.Gibson Stainless sells the two piece clamps complete with Type 316 SS hex head cap screw and Type 316 SS hex nut.-Sizes 1/2" - 2" sold with 1/4" x 1" hex head cap screw, nut-Sizes 2-1/2" - 4" sold with 5/16" x 1" hex head cap screw, nut-Sizes 5" - 8" sold with 5/16" x 1-1/4" hex head cap screw, nutMaterial: 316 SSStandards: ASTM A240, ASTM F593Body 100% Made in USA; hex nut and bolt may or may not be of U.S. origin.