Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SSK 02 RK 1 1 2IN found under Parts Kit Ball Valv by Watts Regulator Co. The National Stock Number assigned to this part is 4820012180024, 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 SSK 02 RK 1 1 2IN.