Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 13D0021-452 found under Bolt Assembled Washer by Buena Park Tool And Engineering Inc. The National Stock Number assigned to this part is 5306014188598, and the Federal Supply Class is 5306 Bolts. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 13D0021-452.