Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4039-042 found under Housing Regulator C by Woodward Governor Company. The National Stock Number assigned to this part is 2995013193985, and the Federal Supply Class is 2995 Miscellaneous Engine Accessories Aircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4039-042.