Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BACB28W12C047 found under Bushing Sleeve by Master Machine Products Corp. The National Stock Number assigned to this part is 3120012889458, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BACB28W12C047.