Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D25438MRR found under Diaphragm Valve Flat by Hunt Valve Company Inc. The National Stock Number assigned to this part is 4820000360714, 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 D25438MRR.