Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PK2001-1 PIECE 22 found under Bearing Sleeve by The Electric Tachometer Corp. The National Stock Number assigned to this part is 3120010289517, 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 PK2001-1 PIECE 22.