Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1805 found under Cup Valve by Gh Bettis A Galvestonhouston Co. The National Stock Number assigned to this part is 4820000979764, 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 1805.