Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AV31-625 PIECE 16 found under Seat Valve by Ives Equipment Corporation. The National Stock Number assigned to this part is 4820012911625, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AV31-625 PIECE 16.