Heyco M3231 LTCG 1/2 Heyco-Tite Liquid Tight Cordgrip, Solar, (10 Pack) Integral Sealing Ring ensures a superior seal at the clearance or threaded mounting hole Approved for NEMA 4, 4X, 6 and 6P applications. Ratchet design provides superior antivibration protection and ensures a firm grip on the cable. Acme threads on body prevent skipping and speed installation. All nylon construction with Buna N or TPE sealing gland