OZ-Gedney Type ABB Insulating Bushing, Size: 6 IN, Phenolic, Black, Connection: Threaded, 150 DEG C, 7-3/8 IN Outside Diameter, 5-7/8 IN Hole, 3/4 IN Thread Length, Maximum Enclosure Thickness: 1/4 IN, 1-1/8 IN Shoulder Height, 1/2 IN Shoulder Height, Third Party Certification: UL File Number E-20933, CSA 011584, Applicable Third Party Standards: UL 514B, CSA C22.2 No.18, Federal Specification W-F-408E, NEMA : FB-1, For Threaded Rigid Conduit And IMC