11990022 – Wright Allen Shoulder Bolt 5/8" x 2 3/4" (Genuine OEM Part)11990022 Wright Allen Shoulder Bolt 5 8" x 2 3 4" (Genuine OEM Part) The Wright 11990022 is a genuine OEM Allen shoulder bolt designed for precision fastening and controlled movement in compatible Wright commercial mowers and outdoor power equipment. Featuring a 5 8 inch diameter with a 2 3 4 inch shoulder length, this bolt is ideal for pivot points, linkage connections, and assemblies where a smooth bearing surface and accurate spacing are required.