Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PS8-52 found under Seat Valve by Federal Equipment Company. The National Stock Number assigned to this part is 4820008325585, 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 PS8-52.