IMC/Rigid Conduit Nipple; Type Threaded Male/Hex Head; Trade Size 3-1/2 Inch; Diameter 4-5/8 Inch; Length 1-1/2 Inch; Throat Type Non-Insulated; Material Ball Burnished Mirror Smooth Die-Cast Zinc; Standard Package 10; Approval UL 514B, UL (Canada and US), CSA; Used On IMC/Rigid Conduit; ROHS Compatible; Applicable Standard Federal Specification A-A-50553, NEMA FB-1