塞頭
一種為密封作用的緊固件, 加上Patch會有防鬆與防漏的效果
表面處理:
- 中文名稱：塞頭
- 依據標準：JIS B0203
- 材質：合金鋼
- 硬度：HRC 36~43
- 表面處理 : 染黑、鍍三價鋅、鍍三價黑鋅、鍍熱浸鍍鋅、鍍白鎳、鍍黑鎳、磷酸鹽、鍍鉻、達可銹、久美特、耐落
- 品管 : 鹽霧測試、硬度測試、拉力測試、PPAP
- 包裝 : 散裝、小盒裝、客製包裝
Unit：inch
| Nominal Size | D | Threads Per Inch | J | T | L | R | |||
|---|---|---|---|---|---|---|---|---|---|
| Nominal O.D | Hexagon Socket Size | Key Engagement Minimum | Overall Length | Basic Pitch Diameter at Socket Face | |||||
| Nominal | Tolerance | Nominal | Tolerance | Nominal | Tolerance | ||||
| 1/16 | 7375 | 28 | 4 | +0.10 +0.03 | 3.0 | 6.0 | 0.4 | 0.45 | +1.1 0 |
| 1/8 | 9.728 | 28 | 5 | +0.10 +0.03 | 3.5 | 7.0 | 0.4 | 0.45 | +1.1 0 |
| 1/4 | 13.157 | 19 | 6 | +0.10 +0.03 | 4.5 | 9.0 | 0.4 | 0.7 | +1.5 0 |
| 3/8 | 16.662 | 19 | 8 | +0.13 +0.04 | 5.0 | 10.0 | 0.5 | 0.7 | +1.5 0 |
| 1/2 | 20.955 | 14 | 10 | +0.13 +0.04 | 6.0 | 12.0 | 0.5 | 0.9 | +2 0 |
| 3/4 | 26.441 | 14 | 14 | +0.23 +0.05 | 7.0 | 16.0 | 0.5 | 0.9 | +2 0 |
| 1 | 33.249 | 11 | 17 | +0.23 +0.05 | 9.0 | 17.5 | 0.5 | 1.1 | +2.2 0 |