Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 23256 found under Housing Diaphragm by Leslie Controls Inc. The National Stock Number assigned to this part is 4820004681085, 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 23256.