Topaz SB4.055 Knockout Bushing, 6/6 Nylon, Black, 3-1/2" x 3-7/16"

Topaz SB4.055 Knockout Bushing, 6/6 Nylon, Black, 3-1/2" x 3-7/16"

KNOCKOUT BUSHINGS: :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.