Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 28-0000077 found under Washer Lock by Scanbe Mfg Co. The National Stock Number assigned to this part is 5310013922648, 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 28-0000077.