Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BB 1121 found under Nut Self Locking Si by Gw Technologies Pty Ltd. The National Stock Number assigned to this part is 5310008431790, 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 BB 1121.