Chase Nipple, Non-Insulated, 1/2 in, 0.929 in Inside Dia, 15/16 in Length, Steel, Electroplated Zinc, NPT, 11/32 in Width, 0.339 in Thread Length, Standards/Approvals: CSA Certified|UL E23018 Listed, Applications: For effectively bush factory or field punched, cut or drilled holes in metal boxes or enclosures, to couple boxes back-to-back, rigid/IMC conduit