NAICS 3321 is the North American Industry Classification System code for Forging and Stamping, a industry group in the Fabricated Metal Product Manufacturing subsector (332) of the Manufacturing sector (31-33). It divides into 5 more specific codes, including Iron and Steel Forging (332111), Nonferrous Forging (332112) and Custom Roll Forming (332114).
NAICS 3321 is the code for Forging and Stamping, a industry group in the North American Industry Classification System (NAICS 2022), under 332 (Fabricated Metal Product Manufacturing). It has 5 more specific codes: 332111, 332112, 332114 and 332117 and others.
The parent of NAICS 3321 is 332, Fabricated Metal Product Manufacturing. Every company under 3321 is also counted under 332.