Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PVS-2D-00398 found under Tester Pressure Gage by Mks Instruments Inc. The National Stock Number assigned to this part is 6685012315408, 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 PVS-2D-00398.