FeaturesSuitable for hazardous locations use in class I, Division 2, class II, Division 1 and 2, class III, Division 1 and 2 per NEC 501-4(b), 502-4 (a) and 503-3 (a)Suitable for hazardous locations use in class II, groups E, F, G and class III locations per CEC 18-202, 18-252, 18-302, 18-352T and b grounding hub has a trade size of 1-1/2 in and is made durable zincIt comes with molded thermoplastic insulating throat to protect wire abrasion and an embedded nitrile ring to ensure watertight sealHub includes hexagonal/angled locknut with 30 deg space between spline enables easy application of torque by wrench or screwdriver that ensures quick/easy installation