Air Grip Group Of Companies offers Electrical Wiring Lock Nut. Air Grip Group Of Companies is an ISO 9001: 2000 certified company. The Electrical Wiring Lock Nut is used as an electrical wiring accessory and is made up of brass rods, tubes and profiles. The Lock Nut is available in various ranges from 10.00mm to 100mm. The Electrical Wiring Lock Nut comes with the tolerance of + 0.05mm with internal and external threading in different sizes.