Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D 67457 PC 4 18 2IN 316 found under Stem Fluid Valve by William Powell Company The. The National Stock Number assigned to this part is 4820012053095, 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 D 67457 PC 4 18 2IN 316.