Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number YB3-97-1821 found under Snap Hook by Bae Systems. The National Stock Number assigned to this part is 5340991142096, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like YB3-97-1821.