Threading Inserts
UNJ 60° Threading Inserts
General Specifications
60° UNJ thread form with a controlled root radius, used on aerospace fasteners and high-fatigue components.
- Thread Form: American Aerospace (UNJ) 60°
- Insert Style: Standard laydown threading insert
- Versions: External and internal, right-hand and left-hand
- Pitch Range: 28–8 TPI
- Insert Sizes: IC 1/4″–3/8″
- Grade: CP5225 — available in every size listed
| Right Hand | Left Hand | Pitch (TPI) | Insert Size INSL (mm) | PDX (mm) | PDY (mm) | IC (in) |
|---|---|---|---|---|---|---|
| 2ER28UNJ | 2EL28UNJ | 28 | 11.0 | 0.7 | 0.7 | 1/4 |
| 2ER24UNJ | 2EL24UNJ | 24 | 11.0 | 0.8 | 0.7 | 1/4 |
| 2ER20UNJ | 2EL20UNJ | 20 | 11.0 | 0.9 | 0.8 | 1/4 |
| 2ER18UNJ | 2EL18UNJ | 18 | 11.0 | 1.0 | 0.8 | 1/4 |
| 2ER16UNJ | 2EL16UNJ | 16 | 11.0 | 1.1 | 0.9 | 1/4 |
| 2ER14UNJ | 2EL14UNJ | 14 | 11.0 | 1.2 | 1.0 | 1/4 |
| 3ER28UNJ | 3EL28UNJ | 28 | 16.0 | 0.7 | 0.7 | 3/8 |
| 3ER24UNJ | 3EL24UNJ | 24 | 16.0 | 0.8 | 0.7 | 3/8 |
| 3ER20UNJ | 3EL20UNJ | 20 | 16.0 | 0.9 | 0.8 | 3/8 |
| 3ER18UNJ | 3EL18UNJ | 18 | 16.0 | 1.0 | 0.8 | 3/8 |
| 3ER16UNJ | 3EL16UNJ | 16 | 16.0 | 1.1 | 0.9 | 3/8 |
| 3ER14UNJ | 3EL14UNJ | 14 | 16.0 | 1.2 | 1.0 | 3/8 |
| 3ER13UNJ | 3EL13UNJ | 13 | 16.0 | 1.3 | 1.0 | 3/8 |
| 3ER12UNJ | 3EL12UNJ | 12 | 16.0 | 1.3 | 1.1 | 3/8 |
| 3ER11UNJ | 3EL11UNJ | 11 | 16.0 | 1.5 | 1.2 | 3/8 |
| 3ER10UNJ | 3EL10UNJ | 10 | 16.0 | 1.5 | 1.2 | 3/8 |
| 3ER9UNJ | 3EL9UNJ | 9 | 16.0 | 1.7 | 1.3 | 3/8 |
| 3ER8UNJ | 3EL8UNJ | 8 | 16.0 | 1.7 | 1.3 | 3/8 |
| Right Hand | Left Hand | Pitch (TPI) | Insert Size INSL (mm) | PDX (mm) | PDY (mm) | IC (in) |
|---|---|---|---|---|---|---|
| 2NR28UNJ | 2NL28UNJ | 28 | 11.0 | 0.7 | 0.7 | 1/4 |
| 2NR24UNJ | 2NL24UNJ | 24 | 11.0 | 0.8 | 0.7 | 1/4 |
| 2NR20UNJ | 2NL20UNJ | 20 | 11.0 | 0.9 | 0.8 | 1/4 |
| 2NR18UNJ | 2NL18UNJ | 18 | 11.0 | 1.0 | 0.8 | 1/4 |
| 2NR16UNJ | 2NL16UNJ | 16 | 11.0 | 1.1 | 0.9 | 1/4 |
| 2NR14UNJ | 2NL14UNJ | 14 | 11.0 | 1.2 | 1.0 | 1/4 |
| 3NR28UNJ | 3NL28UNJ | 28 | 16.0 | 0.7 | 0.7 | 3/8 |
| 3NR24UNJ | 3NL24UNJ | 24 | 16.0 | 0.8 | 0.7 | 3/8 |
| 3NR20UNJ | 3NL20UNJ | 20 | 16.0 | 0.9 | 0.8 | 3/8 |
| 3NR18UNJ | 3NL18UNJ | 18 | 16.0 | 1.0 | 0.8 | 3/8 |
| 3NR16UNJ | 3NL16UNJ | 16 | 16.0 | 1.1 | 0.9 | 3/8 |
| 3NR14UNJ | 3NL14UNJ | 14 | 16.0 | 1.2 | 1.0 | 3/8 |
| 3NR13UNJ | 3NL13UNJ | 13 | 16.0 | 1.3 | 1.0 | 3/8 |
| 3NR12UNJ | 3NL12UNJ | 12 | 16.0 | 1.3 | 1.1 | 3/8 |
| 3NR11UNJ | 3NL11UNJ | 11 | 16.0 | 1.5 | 1.2 | 3/8 |
| 3NR10UNJ | 3NL10UNJ | 10 | 16.0 | 1.5 | 1.2 | 3/8 |
| 3NR9UNJ | 3NL9UNJ | 9 | 16.0 | 1.7 | 1.3 | 3/8 |
| 3NR8UNJ | 3NL8UNJ | 8 | 16.0 | 1.7 | 1.3 | 3/8 |
| 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 | — |