Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S329PC37 found under Disk Valve by Mager Brothers. The National Stock Number assigned to this part is 4820005646779, 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 S329PC37.