Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2172B2002 found under Valve Solenoid by Ross Operating Valve Co. The National Stock Number assigned to this part is 4810001722254, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2172B2002.