Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NW2042 found under Parts Kit Cylinder Head Gasoline Engine by Clayton Hill Greenhouse Co. The National Stock Number assigned to this part is 2805000424978, 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 NW2042.