Integral Sealing Ring ensures a superior seal at the clearance or threaded mounting hole location, every time.Widest range of approved cable diameters. Cable ranges listed are for the maximum IP68 sealing range. Contact Heyco for UL approved 514B cable ranges. IP 68 rated.Approved for NEMA 4, 4X, 6 and 6P applications.Ratchet design of sealing nut assembly provides superior anti-vibration protection and ensures a firm grip on the cable. Acme threads on body prevent skipping and speed installation.All nylon construction with Buna N sealing gland resists salt water, weak acids, gasoline, alcohol, oil, grease, and common solvents. (This feature is not assessed by UL.)Multiple sizes for flexible cord diameters ranging from .065" (1,7 mm) to 1.560" (39,6 mm).We recommend using the fitting with the smallest maximum diameter that will fit your application.Locknuts not included. For nylon locknut specifications or to order locknuts separately, see NPT Nylon Locknuts.See Heyco Liquid Tight Threaded Plugs.