Empire Industries 5/8" Black C-Clamp with Bottom Locking Nut

Material: Carbon Steel Finish: Plain Service: Designed for attaching hanger rod to the bottom flange of a beam. Features the ribbed design for added strength. Hardened steel cup point set screw secures clamp to beam. Approvals: UL - U.L.C. listed 3/8 and 1/2 (1/2 for 4" IPS max) with locknut only. FM approved for 3/8 only with and without locknut. Complies with Federal Specification WW-H-171-E (Type# 23), A-A-1192 A (Type# 23), Manufacturers’ Standard Society SP-58 and MSS SP-69 (Type# 23)