Threading Inserts
UN 60° Threading Inserts
General Specifications
60° American Unified Standard thread form (UN, UNC, UNF, UNEF) for general-purpose inch fasteners and components.
- Thread Form: American Unified (UN) 60°
- Insert Style: Standard laydown threading insert
- Versions: External and internal, right-hand and left-hand
- Pitch Range: 32–4 TPI
- Insert Sizes: IC 1/4″–5/8″
- Grade: CP5225 — available in every size listed
| Right Hand | Left Hand | Pitch (TPI) | Insert Size INSL (mm) | PDX (mm) | PDY (mm) | IC (in) |
|---|---|---|---|---|---|---|
| 2ER32UN | 2EL32UN | 32 | 11.0 | 0.6 | 0.6 | 1/4 |
| 2ER28UN | 2EL28UN | 28 | 11.0 | 0.7 | 0.6 | 1/4 |
| 2ER24UN | 2EL24UN | 24 | 11.0 | 0.8 | 0.7 | 1/4 |
| 2ER20UN | 2EL20UN | 20 | 11.0 | 0.9 | 0.8 | 1/4 |
| 2ER18UN | 2EL18UN | 18 | 11.0 | 1.0 | 0.8 | 1/4 |
| 2ER16UN | 2EL16UN | 16 | 11.0 | 1.1 | 0.9 | 1/4 |
| 3ER32UN | 3EL32UN | 32 | 16.0 | 0.6 | 0.6 | 3/8 |
| 3ER28UN | 3EL28UN | 28 | 16.0 | 0.7 | 0.6 | 3/8 |
| 3ER24UN | 3EL24UN | 24 | 16.0 | 0.8 | 0.7 | 3/8 |
| 3ER20UN | 3EL20UN | 20 | 16.0 | 0.9 | 0.8 | 3/8 |
| 3ER18UN | 3EL18UN | 18 | 16.0 | 1.0 | 0.8 | 3/8 |
| 3ER16UN | 3EL16UN | 16 | 16.0 | 1.1 | 0.9 | 3/8 |
| 3ER14UN | 3EL14UN | 14 | 16.0 | 1.2 | 1.0 | 3/8 |
| 3ER13UN | 3EL13UN | 13 | 16.0 | 1.3 | 1.1 | 3/8 |
| 3ER12UN | 3EL12UN | 12 | 16.0 | 1.4 | 1.1 | 3/8 |
| 3ER11.5UN | 3EL11.5UN | 11.5 | 16.0 | 1.4 | 1.1 | 3/8 |
| 3ER11UN | 3EL11UN | 11 | 16.0 | 1.5 | 1.1 | 3/8 |
| 3ER10UN | 3EL10UN | 10 | 16.0 | 1.5 | 1.1 | 3/8 |
| 3ER9UN | 3EL9UN | 9 | 16.0 | 1.7 | 1.2 | 3/8 |
| 3ER8UN | 3EL8UN | 8 | 16.0 | 2.0 | 1.2 | 3/8 |
| 4ER7UN | 4EL7UN | 7 | 22.0 | 2.3 | 1.6 | 1/2 |
| 4ER6UN | 4EL6UN | 6 | 22.0 | 2.3 | 1.6 | 1/2 |
| 4ER5UN | 4EL5UN | 5 | 22.0 | 2.5 | 1.7 | 1/2 |
| 5ER4.5UN | 5EL4.5UN | 4.5 | 27.0 | 2.7 | 1.9 | 5/8 |
| 5ER4UN | 5EL4UN | 4 | 27.0 | 3.0 | 2.1 | 5/8 |
| Right Hand | Left Hand | Pitch (TPI) | Insert Size INSL (mm) | PDX (mm) | PDY (mm) | IC (in) |
|---|---|---|---|---|---|---|
| 2NR32UN | 2NL32UN | 32 | 11.0 | 0.6 | 0.6 | 1/4 |
| 2NR28UN | 2NL28UN | 28 | 11.0 | 0.7 | 0.6 | 1/4 |
| 2NR24UN | 2NL24UN | 24 | 11.0 | 0.8 | 0.7 | 1/4 |
| 2NR20UN | 2NL20UN | 20 | 11.0 | 0.9 | 0.8 | 1/4 |
| 2NR18UN | 2NL18UN | 18 | 11.0 | 1.0 | 0.8 | 1/4 |
| 2NR16UN | 2NL16UN | 16 | 11.0 | 1.1 | 0.9 | 1/4 |
| 3NR32UN | 3NL32UN | 32 | 16.0 | 0.6 | 0.6 | 3/8 |
| 3NR28UN | 3NL28UN | 28 | 16.0 | 0.7 | 0.6 | 3/8 |
| 3NR24UN | 3NL24UN | 24 | 16.0 | 0.8 | 0.7 | 3/8 |
| 3NR20UN | 3NL20UN | 20 | 16.0 | 0.9 | 0.8 | 3/8 |
| 3NR18UN | 3NL18UN | 18 | 16.0 | 1.0 | 0.8 | 3/8 |
| 3NR16UN | 3NL16UN | 16 | 16.0 | 1.1 | 0.9 | 3/8 |
| 3NR14UN | 3NL14UN | 14 | 16.0 | 1.2 | 1.0 | 3/8 |
| 3NR13UN | 3NL13UN | 13 | 16.0 | 1.3 | 1.1 | 3/8 |
| 3NR12UN | 3NL12UN | 12 | 16.0 | 1.4 | 1.1 | 3/8 |
| 3NR11.5UN | 3NL11.5UN | 11.5 | 16.0 | 1.4 | 1.1 | 3/8 |
| 3NR11UN | 3NL11UN | 11 | 16.0 | 1.5 | 1.1 | 3/8 |
| 3NR10UN | 3NL10UN | 10 | 16.0 | 1.5 | 1.1 | 3/8 |
| 3NR9UN | 3NL9UN | 9 | 16.0 | 1.7 | 1.2 | 3/8 |
| 3NR8UN | 3NL8UN | 8 | 16.0 | 2.0 | 1.2 | 3/8 |
| 4NR7UN | 4NL7UN | 7 | 22.0 | 2.3 | 1.6 | 1/2 |
| 4NR6UN | 4NL6UN | 6 | 22.0 | 2.3 | 1.6 | 1/2 |
| 4NR5UN | 4NL5UN | 5 | 22.0 | 2.5 | 1.7 | 1/2 |
| 5NR4.5UN | 5NL4.5UN | 4.5 | 27.0 | 2.7 | 1.9 | 5/8 |
| 5NR4UN | 5NL4UN | 4 | 27.0 | 3.0 | 2.1 | 5/8 |
| Workpiece Material | CP5230 | CP5225 | CP4325 | NA10 |
|---|---|---|---|---|
| P — Steel | Light intermittent — preferred | Light intermittent — preferred | Light intermittent — preferred | — |
| M — Stainless Steel | Light intermittent — alternative | Light intermittent — preferred | Light intermittent — alternative | — |
| K — Cast Iron | Light intermittent — preferred | Light intermittent — alternative | Light intermittent — preferred | — |
| N — Non-Ferrous Metals | — | — | — | Continuous — preferred |
| S — Heat-Resistant Alloys | — | — | — | — |
| H — Hardened Materials | — | Light intermittent — alternative | Light intermittent — preferred | — |