Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S2090-017-03 found under Bellows Pressure by Veeco Instruments Inc. The National Stock Number assigned to this part is 4820004205134, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S2090-017-03.