FeaturesA unique design with a combination tightening surface that includes both a hex area and a knurled surfaceOptional embedded Viton® O-ring ensures a watertight and corrosion resistant sealAluminum excellent durability and performance for most industrial applicationsAnti-friction washer that fits between the nut and bushing for easier compressionMetallic compositionNEMA 3, NEMA 3R, NEMA 4, NEMA 6 and NEMA 12 enclosureIP52, IP54, IP65, IP67 IEC rating0.81 in ID0.57 in thread sizeForm size 3