This Upper Casing diagram displays the required parts for the 40mhs (6h4)/40ers (6h4)/40prs (6h4)/40trs (6h4) 1994 Upper Casing.
The Washer, Plain (663) is the lowest priced item on this Upper Casing schematic.
In this schematic the "Bolt, With Washer(6h4)" is used most often.