Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AS8600B found under Nut Self Locking Extended Washer by Monadnock Company The. The National Stock Number assigned to this part is 5310008071472, 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 AS8600B.