ASME/ANSI flat washer  covers the dimensional requirments of inch series FLAT WASHER.The standard of ASME/ANSI flat washer  is ASME B18.22.1,Website:http://www.chinajinrui.net,  includes N and W series.  The size from #6-3" diameter. ASME flat washer is widely used, mainly goes with bolt and screw. The mechanical property has 100HV, 140HV, 200HV and 300HV.  StandardGradeFinshASME/ANSI B18.22.1100HV     white zinc      yellow zinc black oxide      H.D.G       Dacromet      ...140HV200HV300HV