Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NC100B found under Stem Fluid Valve by Siemens Demag Delaval Turbomachi. The National Stock Number assigned to this part is 4820003370996, 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 NC100B.