Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SSBN608-400-1955921PC27 found under Disk Valve by P J Valves Inc. The National Stock Number assigned to this part is 4820008605085, 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 SSBN608-400-1955921PC27.