Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2043 found under Button Thrust Idler by Hercules Engine Co Inc. The National Stock Number assigned to this part is 2805005353979, and the Federal Supply Class is 2805 Gasoline Reciprocating Engines Except Aircraft And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2043.