Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21677-0725 found under Armor Plate by Bourns Inc. The National Stock Number assigned to this part is 9515015446097, and the Federal Supply Class is 9515 Plate Sheet Strip Foil And Leaf. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 21677-0725.