详细说明
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螺丝简图和产品规格说明
| 3*8PM 螺丝公称直径，见右图D2.3*8PM 螺丝公称长度，见右图L。3*8PM 螺丝头代号，尺寸见下表。3*8PM螺丝压代号，尺寸见下表。 |
日本（JIS）盘头螺丝尺寸表准（P头）
| 规格（D2） | 螺丝头径（D1） | 螺丝头厚度（H） |
| M1.0 | 1.7~2.0 | 0.50~0.60 |
| M1.2 | 2.1~2.4 | 0.60~0.70 |
| M1.4 | 2.5~2.8 | 0.75~0.85 |
| M1.6 | 2.8~3.2 | 0.85~0.95 |
| M1.7 | 3.0~3.4 | 0.80~1.00 |
| M2.0 | 3.6~4.0 | 1.00~1.20 |
| M2.2 | 4.0~4.4 | 1.10~1.30 |
| M2.3 | 4.2~4.6 | 1.15~1.35 |
| M2.5 | 4.6~5.0 | 1.25~1.45 |
| M2.6 | 4.8~5.2 | 1.30~1.50 |
| M3.0 | 5.5~6.0 | 1.45~1.75 |
| M3.5 | 6.5~7.0 | 1.70~2.00 |
| M4.0 | 7.5~8.0 | 2.00~2.30 |
| M4.5 | 8.4~9.0 | 2.25~2.55 |
| M5.0 | 9.4~10.0 | 2.50~2.80 |
| M6.0 | 11.3~12.0 | 3.00~3.40 |
| M8.0 | 15.2~16.0 | 4.00~4.40 |
日本（JIS）和中国（GB）机械牙尺寸标准（规格代号M）
| 规格 | 牙距（P） | 外径（D） | 辗造径 |
| M1.2 | 0.25 | 1.14~1.18 | 1.01~1.04 |
| M1.4 | 0.30 | 1.34~1.38 | 1.16~1.20 |
| M1.7 | 0.35 | 1.61~1.68 | 1.42~1.46 |
| M2.0 | 0.40 | 1.89~1.98 | 1.69~1.72 |
| M2.3 | 0.40 | 2.19~2.28 | 1.99~2.02 |
| M2.5 | 0.45 | 2.38~2.48 | 2.15~2.18 |
| M3.0 | 0.50 | 2.88~2.98 | 2.61~2.64 |
| M3.5 | 0.60 | 3.36~3.47 | 3.03~3.06 |
| M4.0 | 0.70 | 3.84~3.98 | 3.45~3.49 |
| M4.5 | 0.75 | 4.34~4.47 | 3.92~3.96 |
| M5.0 | 0.80 | 4.83~4.98 | 4.38~4.43 |
| M6.0 | 1.00 | 5.82~5.97 | 5.25~5.30 |
| M7.0 | 1.00 | 6.82~6.97 | 6.25~6.30 |
| M8.0 | 1.25 | 7.79~7.96 | 7.07~7.12 |
螺丝槽型选择
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