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螺纹牙型尺寸 （单位：毫米）
H = 0.866 025 404 P
5H/8 = 0.541 265 877 P
3H/8 = 0.324 759 526 P
H/4 = 0.216 506 351 P
H/8 = 0.108 253 175 P
D₂ = d₂ = d - 0.6495 P
D₁ = d₁ = d - 1.0825 P
公称直径D，d螺距P基准平面内的直径 基准距离b 最小有效螺纹长度b 大径D，d中径D2，d2小径D1，d1标准型L1短型L1短标准型L2短型L2短8 1 8.000 7.350 6.917 5.500 2.500 8.000 5.500 10 1 10.000 9.350 8.917 5.500 2.500 8.000 5.500 12 1 12.000 11.350 10.917 5.500 2.500 8.000 5.500 14 1.5 14.000 13.026 12.376 7.500 3.500 11.000 8.500 16 1 16.000 15.350 14.917 5.500 2.500 8.000 5.500 16 1.5 16.000 15.026 14.376 7.500 3.500 11.000 8.500 20 1.5 20.000 19.026 18.376 7.500 3.500 11.000 8.500 27 2 27.000 25.701 24.835 11.000 5.000 16.000 12.000 33 2 33.000 31.701 30.835 11.000 5.000 16.000 12.000 42 2 42.000 40.701 39.835 11.000 5.000 16.000 12.000 48 2 48.000 46.701 45.835 11.000 5.000 16.000 12.000 60 2 60.000 58.701 57.835 11.000 5.000 16.000 12.000 72 3 72.000 70.051 68.752 16.500 7.500 24.000 18.000 76 2 76.000 74.701 73.835 11.000 5.000 16.000 12.000 90 2 90.000 88.701 87.835 11.000 5.000 16.000 12.000 90 3 90.000 88.051 86.752 16.500 7.500 24.000 18.000 115 2 115.000 113.701 112.835 11.000 5.000 16.000 12.000 115 3 115.000 113.051 111.752 16.500 7.500 24.000 18.000 140 2 140.000 138.701 137.835 11.000 5.000 16.000 12.000 140 3 140.000 138.051 136.752 16.500 7.500 24.000 18.000 170 3 170.000 168.051 166.752 16.500 7.500 24.000 18.000 a. 对圆锥螺纹，不同轴向位置平面内的螺纹直径数值是不同的。要注意各直径的轴向位置。
b. 基准距离有两种型式：标准型和短型。两种基准距离分别对应两种型式的最小有效螺纹长度。标准型基准距离 L₁ 和标准型最小有效螺纹长度 L₂ 适用于由圆锥内螺纹与圆锥外螺纹组成的“锥/锥”配合螺纹；短型基准距离 L1短 和短型最小有效螺纹长度 L2短 适用于由圆柱内螺纹与圆锥外螺纹组成的“柱/锥”配合螺纹。选择时要注意两种配合形式对应两组不同的基准距离和最小有效螺纹长度，避免选择错误。
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