Square Inside Head Filler and Drain Plugs (PTF)
SAE J 531 (130109B) - 2020 加注和排出口用，方头螺堵 (PTF螺纹)
See all versions and complete specifications: Square Inside Head Filler and Drain Plugs (PTF) — Full Specification Page
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 | 14 | 0.72 | 18.3 | 0.627 | 11.18 | 16.26 | 0.640 | 14.2 | 0.56 | 15.93 | 0.440 |
| 1/8 | 18 | 0.36 | 9.1 | 0.440 | 7.87 | 12.06 | 0.475 | 7.9 | 0.31 | 11.18 | 0.310 |
| 3/8 | 11-1/2 | 0.93 | 23.6 | 0.815 | 12.70 | 20.07 | 0.790 | 19 | 0.75 | 20.70 | 0.500 |
| 1/16 | 27 | — | — | 0.283 | 6.10 |
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| 7.87 |
| 0.310 |
| — |
| — |
| 7.19 |
| 0.240 |
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