Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R38-100R found under Parts Kit Pressure by Norgren C A Co. The National Stock Number assigned to this part is 4820012412987, 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 R38-100R.