This NESCO SB87511 1/2 K.O. Bushing is constructed from durable 6/6 Nylon, offering a strong and corrosion-proof solution for mechanical applications. Designed for easy snap-in installation into knockouts, it provides a smooth rounded surface for effortless wire pulling. This bushing is built to resist wear, abrasion, and damage from vibrations, capable of withstanding significant push-back forces. It's ideal for aligning or joining shafts in machinery, pumps, and other industrial equipment.The NESCO SB87511 is a 1/2 K.O. (Knock-Out) bushing made of 6/6 Nylon. It features an inside diameter of 11/16 and an outside diameter of 1/2. The dimensions of the bushing are 0.953 inches in diameter and 0.688 inches in length. It is UL recognized and CSA certified.