Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C4A1 ISSUE 59 found under Washer Lock by General Electric Inc. The National Stock Number assigned to this part is 5310011307316, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like C4A1 ISSUE 59.