The Nut, Lower Lh is the most widely applied product in the GS850G 1981 (X) (E01 E02 E04 E17 E18 E21 E22 E24 E25 E26 E34 E39 REAR SWINGING ARM ( four times ).
Some items from this specific schematic: Nut, Swing Arm Assembly,rear, Washer, Nut, Lower Lh.