AJR Seals list of available in-stock inventory of 400-style Bonded Washers in Nitrile (Buna-N) 70 shore and cold rolled steel. Inner sealing ring bonded to an outer metal retaining washer. Used in applications where stronger sealing is desired around a screw or bolt, as compared to conventional washers. Temp. Range: -40˚F to 250˚F (-40˚C to 120˚C). Other quantities, sizes and materials are available to be ordered. Use the drop down menu to check additional inventory or the link in top menu to request a quote.