一种新型的内螺纹紧固件,将其嵌入金属或非金属材料上形成高强度、耐磨损,具有互换性的标准内螺纹。在铝镁合金等低强度工程材料上应用可明显提高强度和耐磨性;应用在钢件、铸铁上可以提高螺孔的耐用性,防止由于各种振动引起螺纹松动,疲劳断裂及提高螺钉连接时的耐疲劳强度。
际标准的高精度内螺纹,其各项性能均优于攻好丝形成的螺纹。

| 螺纹公称直径 DX P | 自由状态外径 Dz | |||||
| 可供选择的公称长度 | 最小 min | 最大 max | ||||
| 1 D | 1.5 D | 2 D | 2.5 D | 3 D | ||
| 2X0.4 | 2.62 | 2.76 | ||||
| * 2.5 X 0.45 | 3.22 | 3.40 | ||||
| *3 X 0.5 | 3.82 | 4.00 | ||||
| *4 X 0.7 | 5.12 | 5.30 | ||||
| *5 X 0.8 | 6.32 | 6.54 | ||||
| *6 X 1 | 7.62 | 7.84 | ||||
| *7 X 1 | 8.72 | 8.94 | ||||
| *8 X 1 | 9.82 | 10.04 | ||||
| *8 X 1.25 | 10.06 | 10.34 | ||||
| *10 X 1 | 12.08 | 12.36 | ||||
| 10X1.25 | 12.10 | 12.50 | ||||
| *10 X 1.5 | 12.52 | 12.80 | ||||
| *12 X 1.5 | 14.68 | 14.96 | ||||
| *12 X 1.75 | 14.96 | 15.20 | ||||
| *14 X 1.5 | 16.92 | 17.20 | ||||
| *16 X 1.5 | 19.18 | 19.52 | ||||
| *16 X 2 | 19.40 | 19.90 | ||||
| 18X1.5 | 21.48 | 21.82 | ||||
| *20 X 1.5 | 23.82 | 24.16 | ||||
| 20X2.5 | 23.70 | 24.20 | ||||
| 22X1.5 | 26.00 | 26.52 | ||||
| 24X1.5 | 28.40 | 28.92 | ||||
| *24 X 2 | 28.50 | 29.00 | ||||
| 24X3 | 28.60 | 29.10 | ||||
| 27X1.5 | 32.02 | 32.64 | ||||
| 27X2 | 31.94 | 32.56 | ||||
| 30X1.5 | 35.74 | 36.36 | ||||
| *30 X 2 | 35.50 | 36.12 | ||||
| 30X3.5 | 35.20 | 35.75 | ||||
| 33X1.5 | 39.56 | 40.18 | ||||
| 33X2 | 39.12 | 39.74 | ||||
| 36X1.5 | 42.10 | 42.60 | ||||
| 39X2 | 45.10 | 45.60 | ||||
| 45X1.5 | 52.50 | 53.50 | ||||
| 48X3 | 55.17 | 56.07 | ||||
| 丝套螺 纹规格 dXp | 丝套螺纹公称长度 Xd | 丝套用螺纹孔参数 | 自由状态下丝套数 | ||
| 螺孔 | 钻孔时 | 丝套 | 丝套 圈数 (≈) | ||
| 2 X 0.4 | 2d 2.5d 3d | 4 5 6 | 2.1 | 2.6-2.8 | 7.7 9.9 12.2 |
| 2.5 X 0.45 | 2d 2.5d 3d | 5 6.5 7.5 | 2.6 | 3.2-3.45 | 9.6 11.1 13.6 |
| ZST * 3 X 0.5 | 1d 1.5d 2d 2.5d 3d | 3 4.5 6 7.5 9 | 3.2 | 3.82-4.00 | 3.9 6.3 8.7 11.0 13.5 |
| ZST4 X 0.7 | 1d 1.5d 2d 2.5d 3d | 4 6 8 10 12 | 4.2 | 5.15-5.35 | 3.7 6.1 8.4 11.0 13.2 |
| ZST5 X 0.8 | 1d 1.5d 2d 2.5d 3d | 5 7.5 10 12.5 15 | 5.2 | 6.35-6.6 | 4.3 6.9 9.7 12.3 15.0 |
| ZST6 X 1 | 1d 1.5d 2d 2.5d 3d | 6 9 12 15 18 | 6.3 | 7.6-7.85 | 4.2 6.9 9.6 12.3 14.6 |
| ZST8 X 1.25 | 1d 1.5d 2d 2.5d 3d | 8 12 16 20 24 | 8.4 | 9.85-10.1 | 4.7 7.4 10.6 13.5 16.4 |
| ZST10 X 1.25 | 1d 1.5d 2d | 10 15 20 | 10.3 | 12.1-12.4 | 6.0 9.7 13.4 |
| ZST10 X 1.5 | 1d 1.5d 2d 2.5d 3d | 10 15 20 25 30 | 10.4 | 12.1-12.5 | 5.0 8.1 11.2 14.2 17.2 |
| ZST12 X 1.25 | 1d 1.5d 2d | 12 18 24 | 12.4 | 14.2-14.5 | 7.4 11.6 15.9 |
| ZST12 X 1.75 | 1d 1.5d 2d 2.5d 3d | 12 18 24 30 36 | 12.5 | 14.4-14.8 | 5.2 8.4 11.7 14.7 18.0 |
| ZST14 X 1.25 | 1d 1.5d 2d | 14 21 28 | 14.4 | 17.2-17.4 | 8.4 12.4 16.3 |
| ZST14 X 1.5 | 1d 1.5d 2d | 14 21 28 | 14.5 | 17.2-17.7 | 7.1 11.2 15.3 |
| ZST14 X2 | 1d 1.5d 2d | 14 21 28 | 14.4 | 17.2.17.7 | 5.2 8.3 11.5 |
| ZST16 X 2 | 1d 1.5d 2d 2.5d | 16 24 32 40 | 16.5 | 19.4-19.9 | 6.1 9.7 13.8 16.8 |
| ZST18 X 1.5 | 0.75d 1d 1.5d 2d | 13.5 18 27 36 | 18.5 | 21.5-22 | 7.0 9.5 14.9 20.2 |
| ZST18 X 2.5 | 1d 1.5d 2d | 18 27 36 | 18.5 | 21.84-22.24 | 6 9.5 12.8 |
| ZST20 X 1.5 | 1d 1.5d 2d | 20 30 40 | 20.5 | 23.7-24.2 | 10.7 16.7 22.4 |
| ZST20 X 2.5 | 1d 1.5d 2d | 20 30 40 | 20.75 | 23.7-24.2 | 6.3 10.0 13.7 |
| ZST22 X 1.5 | 1d 1.5d | 22 33 | 22.5 | 26.3-26.8 | 11.7 18.1 |
| ZST24 X 1.5 | 1d 1.5d 2d 2.5d 3d | 24 36 48 60 72 | 24.5 | 28.6-29.1 | 12.9 19.8 26.7 33.6 40.6 |
| ZST24 X 3 | 1d 1.5d 2d | 24 30 40 | 24.8 | 28.6-29.1 | 6.3 10.0 14.0 |
| 27 X 1.5 | 0.75d 1d 1.5d | 20.3 27 40.5 | 27.5 | 32.2-32.7 | 11.0 14.6 18.3 |
| 27 X 2 | 0.75d 1d 1.5d | 20.3 27 40.5 | 27.6 | 32.2-32.7 | 8.0 10.8 16.8 |
| 30 X 3.5 | 1d 1.5d 2d | 30 45 60 | 31.0 | 35.2-35.7 | 7 11 14.9 |
| 36 X 1.5 | 1d | 36 | 36.5 | 41.2-41.9 | 20 |
| 39 X 2 | 45.10-45.60 | ||||
| 45 X 1.5 | 52.50-53.50 | ||||
| 48 X 3 | 55.17-56.07 | ||||
度按标准选择4~20之间的任意偶数圈,还可以按公称直径的倍数选择。




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