#12 ID x 3/8 OD (ID fits #12 threaded fasteners) 20 Gauge Hot-Dip Galvanized Steel with Bonded NEOPRENE Rubber Washer (oil resistant). 25,000/Box. Price/Box.
Neoprene backed sealing washer for oil exposed application. ASTM A-527 20 Gauge Hot Dip Galvanized Steel; Neoprene Rubber, 70 durometer hardness per ASTM D2000; Overall thickness about .120"-.130" before compression; Available compression about 0.030"; Ne