Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R22-1023K found under Parts Kit Diaphragm by Marmon Herrington Company Inc. The National Stock Number assigned to this part is 4820015703951, 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 R22-1023K.