3/4 IN KNOCKOUT BSHGS - ID 7/8 IN

Topaz?s knockout bushings, constructed of lightweight, corrosion proof, strong 6/6 nylon are suitable for use with electrical knockouts. Ideal for fast and easy snap in installation into a knockout in a box or enclosure with vacancies from maintenance or modifications. Smooth rounded surface enables easy wire pulling. Resists wear, abrasion and damage from vibrations; capable of withstanding a push back force of greater than 35 pounds. Diameter sizes from 3/8? up to 3 7/8?, KO sizes from 1/2? to 3 1/2?; available in black. UL recognition.