Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C71-21 found under Stem Adjustment Carburetor by Cnh Industrial America Llc. The National Stock Number assigned to this part is 4820003544900, 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 C71-21.