ASME B18.21.1 pdf download Washers: Helical Spring-Lock, Tooth Lock, and Plain Washers (Inch Series) 1.8 Lot For all inspections referenced in this Standard, the lot shall consist of all washers of one type, grade, style, finish, and size fabricated by the same production pro- cess from the same heat number of metal as provided by the metal manufacturer, and submitted...