Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 537998-3 found under Control Assembly Pu by West Salem Machinery Company. The National Stock Number assigned to this part is 2590011560447, and the Federal Supply Class is 2590 Miscellaneous Vehicular Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 537998-3.