Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ST066000AV found under Valve Control by Sears Roebuck And Co. The National Stock Number assigned to this part is 4820011556710, 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 ST066000AV.