Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number G81019 2 1 2IN found under Valve Gate by F S Welsford Company. The National Stock Number assigned to this part is 4820011406185, 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 G81019 2 1 2IN.