Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 217379 found under Diaphragm Assembly by Crown Coachworks Inc. The National Stock Number assigned to this part is 4820011039362, 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 217379.