Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ARB0R 1 found under Blade Hole Saw by Armstrong Blum Mfg Co. The National Stock Number assigned to this part is 3455008517301, 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 ARB0R 1.