Brake Cylinder Pin Retainer Kit

Retaining hardware kit used to lock WABCO/Budd disk brake cylinder pins in place on the disk brake tongs. Kit contains one each of a 3/4"-10 castellated nut, a 3/4" washer, a stainless steel spring and a cotter pin.

 
Old Brake Cylinder Pin Retainer

If your brake cylinder pin retaining hardware looks like this (rusted out nut, collapsed or rusted out spring, rusted out washer), maybe its time for a brand new set of retaining hardware.