Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HRW507368-1 found under Diaphragm Valve Flat by Beta Fluid Systems Inc. The National Stock Number assigned to this part is 4820007370226, 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 HRW507368-1.