| 2007 NAICS | 2012 NAICS | 2017 NAICS | Corresponding Index Entries | |||
| 332611 | 332613 | 332613 | Automobile suspension springs, heavy gauge metal, manufacturing | |||
| 332612 | 332613 | 332613 | Coiled springs (except clock, watch), light gauge, made from purchased wire or strip, manufacturing | |||
| 332611 | 332613 | 332613 | Coiled springs, heavy gauge metal, manufacturing | |||
| 332611 | 332613 | 332613 | Disk and ring springs, heavy gauge metal, manufacturing | |||
| 332612 | 332613 | 332613 | Flat springs (except clock, watch), light gauge, made from purchased wire or strip, manufacturing | |||
| 332611 | 332613 | 332613 | Flat springs, heavy gauge metal, manufacturing | |||
| 332612 | 332613 | 332613 | Furniture springs, light gauge, unassembled, made from purchased wire or strip | |||
| 332612 | 332613 | 332613 | Gun springs, light gauge, made from purchased wire or strip, manufacturing | |||
| 332612 | 332613 | 332613 | Hairsprings (except clock, watch), light gauge, made from purchased wire or strip, manufacturing | |||
| 332611 | 332613 | 332613 | Helical springs, hot wound heavy gauge metal, manufacturing | |||
| 332612 | 332613 | 332613 | Helical springs, light gauge, made from purchased wire or strip, manufacturing | |||
| 332612 | 332613 | 332613 | Instrument springs, precision (except clock, watch), light gauge, made from purchased wire or strip, manufacturing | |||
| 332611 | 332613 | 332613 | Leaf springs, heavy gauge metal, manufacturing | |||
| 332612 | 332613 | 332613 | Mattress springs and spring units, light gauge, made from purchased wire or strip | |||
| 332612 | 332613 | 332613 | Sash balance springs, light gauge, made from purchased wire or strip | |||
| 332612 | 332613 | 332613 | Springs and spring units for seats, light gauge, made from purchased wire or strip | |||
| 332611 | 332613 | 332613 | Springs, heavy gauge metal, manufacturing | |||
| 332612 | 332613 | 332613 | Springs, light gauge (except clock, watch), made from purchased wire or strip | |||
| 332612 | 332613 | 332613 | Springs, precision (except clock, watch), light gauge, made from purchased wire or strip | |||
| 332611 | 332613 | 332613 | Torsion bar, heavy gauge metal, manufacturing | |||
| 332612 | 332613 | 332613 | Upholstery springs and spring units, light gauge, made from purchased wire or strip |