| 2007 NAICS | 2012 NAICS | 2017 NAICS | Corresponding Index Entries | |||
| 333992 | 333992 | 333992 | Arc-welding equipment manufacturing | |||
| 333992 | 333992 | 333992 | Electrode holders, welding, manufacturing | |||
| 333992 | 333992 | 333992 | Electrodes, welding, manufacturing | |||
| 333992 | 333992 | 333992 | Electron beam welding equipment manufacturing | |||
| 333992 | 333992 | 333992 | Gas welding equipment manufacturing | |||
| 333992 | 333992 | 333992 | Gas welding rods, coated or cored, manufacturing | |||
| 333992 | 333992 | 333992 | Generating apparatus and parts, welding, electrical, manufacturing | |||
| 333992 | 333992 | 333992 | Laser welding equipment manufacturing | |||
| 333992 | 333992 | 333992 | Plasma welding equipment manufacturing | |||
| 333992 | 333992 | 333992 | Resistance welding equipment manufacturing | |||
| 333992 | 333992 | 333992 | Seam welding equipment manufacturing | |||
| 333992 | 333992 | 333992 | Soldering equipment (except handheld) manufacturing | |||
| 333992 | 333992 | 333992 | Spot welding equipment manufacturing | |||
| 333992 | 333992 | 333992 | Ultrasonic welding equipment manufacturing | |||
| 333992 | 333992 | 333992 | Welding equipment manufacturing | |||
| 333992 | 333992 | 333992 | Welding wire or rods (i.e., coated, cored) manufacturing |