Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 19B2318B-24 found under Cap Valve by Mmc International Corp. The National Stock Number assigned to this part is 4810014684778, 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 19B2318B-24.