Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 508-4325932 PIECE 5 found under Seat Valve by Celanese Plastics Co. The National Stock Number assigned to this part is 4820011647061, 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 508-4325932 PIECE 5.