Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 206A found under Piston Valve by Ruthman Pump And Engineering Inc. The National Stock Number assigned to this part is 4820000016181, 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 206A.