Conduit Grounding Bushing; Type Threaded; Trade Size 1 Inch; Wire Size 14 AWG Solid to 4 AWG Stranded; Lug Type Tin Electroplated 6061-T6 Aluminum Alloy; Throat Type Insulated; Diameter 1-9/16 Inch; Height 1/2 Inch; Material Ball Burnished Mirror Smooth Die-Cast Zinc; Standard Package 250; Approval UL 514B, UL (Canada and US); Used On IMC/Rigid Conduit; ROHS Compatible; Applicable Standard Federal Specification A-A-50553, NEMA FB-1; Insulator Material Nylon; Insulation Temperature 150 Deg C