Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RCT-140-170 found under by Conrader R Co Inc. The National Stock Number assigned to this part is 4820009096585, 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 RCT-140-170.