Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 41S2-316 found under Valve Ball by Whitey Co. The National Stock Number assigned to this part is 4820010139724, 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 41S2-316.