Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 850 1X1X2X4-1 2 found under Cutter Milling End by Trw Inc. The National Stock Number assigned to this part is 3455010262553, and the Federal Supply Class is 3455 Cutting Tools For Machine Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 850 1X1X2X4-1 2.