Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S12547-340 found under Ring Piston by Superior Pipe Specialties Co. The National Stock Number assigned to this part is 2810011604047, and the Federal Supply Class is 2810 Gasoline Reciprocating Engines Aircraft Prime Mover And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S12547-340.