5/16" ID x 5/8" OD (about .344" metal ID and .290" rubber ID fits/seals 5/16" fastener) 20 Gauge Hot-Dip Galvanized Steel with Bonded EPDM Rubber Washer. 7500/Box. Price/Box.
MATERIALS: ASTM A-527 20 Gauge Hot Dip Galvanized Steel; Black EPDM Rubber, 70 durometer hardness per ASTM D2000; Overall thickness about .130"-.135" before compression; Available compression about 0.030"; EPDM thickness about 0.065".
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OPTIONS: Also available with 3/4" OD, backing materials of galvanized steel, high tensile aluminum, 304 stainless and 316 stainless steel, with facing (sealing) materials of neoprene or EPDM, and in boxes of 1000 - 2000. Please email for current pricing and available sizes.
similar product terms: seal washer, sealing washer, stainless steel sealing washer, flashing washer, anchor washer, bonded sealing washer, roofing washer