Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4-D-27848-V found under Valve Air Control by Stamets Wm K Co. The National Stock Number assigned to this part is 4820012230783, 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 4-D-27848-V.