Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EX375-3C1 found under Diaphragm Valve Flat by Deltrol Corp. The National Stock Number assigned to this part is 4820001158911, 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 EX375-3C1.