Conduit Lock nuts Size:1/2"-- 4" Material: Galvanized steel Standard: ... UL 514B Apply: Rigid or IMC conduit, threaded fittings UL Zinc Plated Steel Lock ... NutThe Hanysen 1/2 - 4 in. Conduit Locknuts are designed ... /ALUMINUM/STEEL CONNECTOR, COUPLING, STRAP, PULL ELBOW, LOCK NUT, SERVICE ENTRANCE CAP, CONDUIT BENDERIMC/RIGID CONDUIT ...