Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 22-38646 PIECE 9 found under Diaphragm Valve Fla by Treadwell Corporation. The National Stock Number assigned to this part is 4820009358810, 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 22-38646 PIECE 9.