Locknut, Material of Construction: Steel, Nut Type: Locknut, Thread Size: 4 IN, Height: 0.38 IN, Width: 5.44 IN, Size: 4 IN, Standard: UL 514B, UL File Number E14814, CSA C22.2 No. 18.3, CSA Certified 065178, NEMA FB-1, For Rigid Conduit And IMC