Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1018455A found under Valve Calibrated Flow by Twin Disc Incorporated. The National Stock Number assigned to this part is 4820015729355, 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 1018455A.