Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D25449 found under Diaphragm Actuator Valve Special Shaped by Hammel Dahl Inc. The National Stock Number assigned to this part is 4820000360815, 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 D25449.