Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B1504KT found under Washer Flat by Rosenbauer International Ag. The National Stock Number assigned to this part is 5310015630432, 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 B1504KT.