Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9941-1629 found under Valve Ball by Kalyn Siebert I Inc. The National Stock Number assigned to this part is 4820016532650, 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 9941-1629.