Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2620-922X9 PIECE4 found under Nut Yoke Valve by Electric Boat Corporation. The National Stock Number assigned to this part is 5310011298556, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2620-922X9 PIECE4.