Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 542 20 20-62 found under Washer Flat by Target Inc. The National Stock Number assigned to this part is 5310016301818, 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 542 20 20-62.