Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2001764 REV D ITEM 4 found under Voltmeter by Hdt Tactical Power Inc. The National Stock Number assigned to this part is 6625015337140, 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 2001764 REV D ITEM 4.