Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2323021 found under Diaphragm by Johnson And Towers Inc. The National Stock Number assigned to this part is 2990014120960, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2323021.