Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 31763 found under Cock Shutoff Screw Stem by Taylor Dunn Corporation. The National Stock Number assigned to this part is 4820009182491, 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 31763.