Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 645E198 found under Valve Pneumatic Tan by Schrader Bridgeport International. The National Stock Number assigned to this part is 4820005163331, 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 645E198.