Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 055-0008R000 found under Valve Rotary Selector by Williams Fire And Hazard Control Inc. The National Stock Number assigned to this part is 4820015955421, 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 055-0008R000.