Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 25-33-90024 PC4 found under Seat Valve by Pratt Henry Co. The National Stock Number assigned to this part is 4820012723908, 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 25-33-90024 PC4.