Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PA20397 2150 ITEM 74 found under Tachometer Mechanical Fixed Moun by Alstom Power Conversion Usa Inc. The National Stock Number assigned to this part is 6680015527311, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PA20397 2150 ITEM 74.