Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number VD210381N found under Valve Cartridge Flo by Rostra Vernatherm Llc. The National Stock Number assigned to this part is 4820011933067, 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 VD210381N.