Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B1143-6 found under Clamp by Beaver Precision Products Inc. The National Stock Number assigned to this part is 1680007718633, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B1143-6.