Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 79091901-B found under Valve Assembly by R H Industriesinc. The National Stock Number assigned to this part is 4820014090046, 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 79091901-B.