
| ral Flu | ed | ap | Overall length | Thread length | Thread+Neck length | Shank length | Shank dia. | Size of square | Length of square | |||
| P Spiral Fl | uted T | aps | L | ℓ | ℓn | ℓs | Ds | K | ℓk | |||
| Size | Class | Code | Chamfer | L (inch) | ℓ (inch) | ℓn (inch) | ℓs (inch) | Ds (inch) | K (inch) | ℓk (inch) | No. of flutes | Type |
| 1 1/2-6UNC | GH5 GH6 | SSU24Z5NEB SSU24Z6NEB | 2.5P | 7.874 | 2.323 | - | 4.016 | 1.233 | 0.925 | 1.125 | 4 | 4 |
| 1 1/2-12UNF | GH4 GH5 | SSU24S4NEB SSU24S5NEB | 2.5P | 7.874 | 2.323 | - | 4.016 | 1.233 | 0.925 | 1.125 | 4 | 4 |