UNJ External Threads:
Single Profile Thread Mill (SPTM)
Precision-engineered for aerospace and critical applications, our UNJ External Threads Single Profile Thread Mills conform to AS8879 standards for external UNJ threads. The non-crest cutting design allows maximum flexibility for plated and non-standard thread diameters, while minimal side cutting pressure ensures superior thread quality and longer tool life. Available uncoated or with AlTiN+ coating for enhanced heat resistance and durability in demanding materials.
| External Thread/Pitch | A (Tool Diameter) | B (Length of Cut) | C (Neck Diameter) | R (Root Radius) | Q (Length) | S (Shank Diameter) | OAL | Flutes | Uncoated Tool # | Uncoated EDP # | AlTiN+ EDP # |
|---|---|---|---|---|---|---|---|---|---|---|---|
| UNJ-32 | 0.372 | 1.000 | 0.240 | 0.0051 | 0.043 | 0.375 | 3.00 | 4 | SPTM372-32EXJ | 120916 | 120934 |
| UNJ-28 | 0.372 | 1.000 | 0.240 | 0.0059 | 0.043 | 0.375 | 3.00 | 4 | SPTM372-28EXJ | 120913 | 120931 |
| UNJ-24 | 0.372 | 1.000 | 0.240 | 0.0069 | 0.044 | 0.375 | 3.00 | 4 | SPTM372-24EXJ | 120910 | 120928 |
| UNJ-20 | 0.372 | 1.000 | 0.240 | 0.0082 | 0.044 | 0.375 | 3.00 | 4 | SPTM372-20EXJ | 120907 | 120925 |
| UNJ-18 | 0.372 | 1.000 | 0.240 | 0.0091 | 0.045 | 0.375 | 3.00 | 4 | SPTM372-18EXJ | 120904 | 120922 |
| UNJ-16 | 0.372 | 1.000 | 0.240 | 0.0103 | 0.046 | 0.375 | 3.00 | 4 | SPTM372-16EXJ | 120901 | 120919 |
| UNJ-12 | 0.488 | 1.400 | 0.340 | 0.0137 | 0.052 | 0.500 | 3.50 | 5 | SPTM488-12EXJ | 120937 | 120940 |