Screws for Plastic to JIS - hole sizes
The following tables contain reference hole sizes to install our range of JIS threadforming and thread tapping screws.
| Nom dia. | S-thread hole size - Length of thread engagement | |||||||
|---|---|---|---|---|---|---|---|---|
| 0.8 | 1.0 | 1.2 | 1.6 | 2.0 | 2.6 | 3.2 | 4.0 | |
| 2.0 | 1.76 | 1.78 | 1.80 | 1.83 | 1.85 | - | - | - |
| 2.3 | 2.05 | 2.07 | 2.08 | 2.10 | 2.13 | - | - | - |
| 2.5 | 2.23 | 2.24 | 2.26 | 2.28 | 2.31 | 2.33 | - | - |
| 2.6 | 2.33 | 2.34 | 2.36 | 2.38 | 2.41 | 2.43 | 2.46 | - |
| 3.0 | 2.70 | 2.72 | 2.74 | 2.76 | 2.78 | 2.81 | 2.86 | 2.86 |
| 3.5 | 3.15 | 3.17 | 3.20 | 3.23 | 3.27 | 3.29 | 3.32 | 3.34 |
| 4.0 | 3.61 | 3.64 | 3.67 | 3.71 | 3.75 | 3.78 | 3.81 | 3.83 |
| 5.0 | 4.57 | 4.62 | 4.64 | 4.66 | 4.71 | 4.77 | 4.80 | 4.81 |
| 6.0 | - | 5.53 | 5.56 | 5.59 | 5.63 | 5.70 | 5.74 | 5.79 |
| 8.0 | - | - | - | 7.52 | 7.56 | 7.61 | 7.67 | 7.73 |
| Nom dia. | B-thread hole size for plastics - Length of thread engagement | |||||
|---|---|---|---|---|---|---|
| 1.5d | 2.0d | 2.5d | 3.0d | 3.5d | 4.0d | |
| 2.0 | 1.65 | 1.68 | 1.71 | 1.73 | 1.75 | 1.77 |
| 2.3 | 1.91 | 1.95 | 1.97 | 1.99 | 2.03 | 2.06 |
| 2.6 | 2.15 | 2.19 | 2.21 | 2.24 | 2.26 | 2.29 |
| 3.0 | 2.49 | 2.51 | 2.54 | 2.59 | 2.65 | 2.68 |
| 3.5 | 2.94 | 2.97 | 3.03 | 3.10 | 3.14 | 3.17 |
| 4.0 | 3.39 | 3.43 | 3.47 | 3.54 | 3.58 | 3.62 |
| 5.0 | 4.33 | 4.38 | 4.43 | 4.53 | 4.58 | 4.63 |
| 6.0 | 5.27 | 5.33 | 5.44 | 5.51 | 5.57 | 5.57 |
| 8.0 | 6.99 | 7.13 | 7.28 | 7.36 | 7.43 | 7.44 |
| P-thread hole sizes | ||
|---|---|---|
| Nom dia. | Thickness of mating ABS & PP materials | |
| Less than (2 x thread diameter) | (2 x thread diameter) or more | |
| 2.0 | 1.70 | 1.75 |
| 2.3 | 2.00 | 2.05 |
| 2.5 | 2.10 | 2.15 |
| 2.6 | 2.20 | 2.25 |
| 3.0 | 2.50 | 2.60 |
| 3.5 | 3.02 | 3.10 |
| 4.0 | 3.44 | 3.55 |
| 5.0 | 4.37 | 4.45 |
| 6.0 | 5.26 | 5.35 |
| 8.0 | 7.16 | 7.25 |