Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T20-0028 found under Bushing Sleeve by Tampo Industries Inc. The National Stock Number assigned to this part is 3120012141973, 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 T20-0028.