Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SK2-16-4 found under Parts Kit Linear Di by Bae Systems Land And Armaments L P. The National Stock Number assigned to this part is 4820013357318, 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 SK2-16-4.