统一螺纹(UN)系列螺纹丝套规格、型式尺寸及安装参数表(3-2)
（1/2-13UNC～1 1/16-18UNEF）
规格 公称直径(mm) 螺距(mm) 公称长度 钻孔深度 攻丝深度 钻孔直径(mm)
L1(mm) L2(mm) 切削丝锥 挤压丝锥
d p xd L(mm) min min min   max min   max
1/2-13UNC 0.5000-13 12.700 1.95 1d 12.7 21.49 16.61 13.09 13.28 14.20 14.40
12.700 1.95 1.5d 19.1 27.84 22.96 13.09 13.28 14.20 14.40
12.700 1.95 2d 25.4 34.19 29.31 13.09 13.28 14.20 14.40
12.700 1.95 2.5d 31.8 40.54 35.66 13.09 13.28 14.20 14.40
12.700 1.95 3d 38.1 46.89 42.01 13.09 13.28 14.20 14.40
12.700 1.95 3.5d 44.5 53.24 48.36 13.09 13.28 14.20 14.40
12.700 1.95 4d 50.8 59.59 54.71 13.09 13.28 14.20 14.40
1/2-16UN    0.5000-16 12.700 1.59 1d 12.7 19.84 15.88 13.02 13.17 13.92 14.08
12.700 1.59 1.5d 19.1 26.19 22.23 13.02 13.17 13.92 14.08
12.700 1.59 2d 25.4 32.54 28.58 13.02 13.17 13.92 14.08
12.700 1.59 2.5d 31.8 38.89 34.93 13.02 13.17 13.92 14.08
12.700 1.59 3d 38.1 45.24 41.28 13.02 13.17 13.92 14.08
12.700 1.59 3.5d 44.5 51.59 47.63 13.02 13.17 13.92 14.08
12.700 1.59 4d 50.8 57.94 53.98 13.02 13.17 13.92 14.08
1/2-20UNF  0.5000-20 12.700 1.27 1d 12.7 18.42 15.24 12.95 13.08 13.68 13.80
12.700 1.27 1.5d 19.1 24.77 21.59 12.95 13.08 13.68 13.80
12.700 1.27 2d 25.4 31.12 27.94 12.95 13.08 13.68 13.80
12.700 1.27 2.5d 31.8 37.47 34.29 12.95 13.08 13.68 13.80
12.700 1.27 3d 38.1 43.82 40.64 12.95 13.08 13.68 13.80
12.700 1.27 3.5d 44.5 50.17 46.99 12.95 13.08 13.68 13.80
12.700 1.27 4d 50.8 56.52 53.34 12.95 13.08 13.68 13.80
1/2-28UNEF 0.5000-28 12.700 0.91 1d 12.7 16.78 14.51 12.88 12.97 13.40 13.49
12.700 0.91 1.5d 19.1 23.13 20.86 12.88 12.97 13.40 13.49
12.700 0.91 2d 25.4 29.48 27.21 12.88 12.97 13.40 13.49
12.700 0.91 2.5d 31.8 35.83 33.56 12.88 12.97 13.40 13.49
12.700 0.91 3d 38.1 42.18 39.91 12.88 12.97 13.40 13.49
12.700 0.91 3.5d 44.5 48.53 46.26 12.88 12.97 13.40 13.49
12.700 0.91 4d 50.8 54.88 52.61 12.88 12.97 13.40 13.49
1/2-32UN    0.5000-32 12.700 0.79 1d 12.7 16.27 14.29 12.86 12.94 13.31 13.39
12.700 0.79 1.5d 19.1 22.62 20.64 12.86 12.94 13.31 13.39
12.700 0.79 2d 25.4 28.97 26.99 12.86 12.94 13.31 13.39
12.700 0.79 2.5d 31.8 35.32 33.34 12.86 12.94 13.31 13.39
12.700 0.79 3d 38.1 41.67 39.69 12.86 12.94 13.31 13.39
12.700 0.79 3.5d 44.5 48.02 46.04 12.86 12.94 13.31 13.39
12.700 0.79 4d 50.8 54.37 52.39 12.86 12.94 13.31 13.39
9/16-12UNC 0.5630-12 14.288 2.12 1d 14.3 23.81 18.52 14.71 14.92 15.92 16.13
14.288 2.12 1.5d 21.4 30.96 25.66 14.71 14.92 15.92 16.13
14.288 2.12 2d 28.6 38.10 32.81 14.71 14.92 15.92 16.13
14.288 2.12 2.5d 35.7 45.24 39.95 14.71 14.92 15.92 16.13
14.288 2.12 3d 42.9 52.39 47.10 14.71 14.92 15.92 16.13
14.288 2.12 3.5d 50.0 59.53 54.24 14.71 14.92 15.92 16.13
14.288 2.12 4d 57.2 66.68 61.38 14.71 14.92 15.92 16.13
9/16-16UN 0.5630-16 14.288 1.59 1d 14.3 21.43 17.46 14.60 14.76 15.51 15.67
14.288 1.59 1.5d 21.4 28.58 24.61 14.60 14.76 15.51 15.67
14.288 1.59 2d 28.6 35.72 31.75 14.60 14.76 15.51 15.67
14.288 1.59 2.5d 35.7 42.86 38.89 14.60 14.76 15.51 15.67
14.288 1.59 3d 42.9 50.01 46.04 14.60 14.76 15.51 15.67
14.288 1.59 3.5d 50.0 57.15 53.18 14.60 14.76 15.51 15.67
14.288 1.59 4d 57.2 64.29 60.33 14.60 14.76 15.51 15.67
9/16-18UNF 0.5630-18 14.288 1.41 1d 14.3 20.64 17.11 14.57 14.71 15.37 15.51
14.288 1.41 1.5d 21.4 27.78 24.25 14.57 14.71 15.37 15.51
14.288 1.41 2d 28.6 34.93 31.40 14.57 14.71 15.37 15.51
14.288 1.41 2.5d 35.7 42.07 38.54 14.57 14.71 15.37 15.51
14.288 1.41 3d 42.9 49.21 45.68 14.57 14.71 15.37 15.51
14.288 1.41 3.5d 50.0 56.36 52.83 14.57 14.71 15.37 15.51
14.288 1.41 4d 57.2 63.50 59.97 14.57 14.71 15.37 15.51
9/16-20UN 0.5630-20 14.288 1.27 1d 14.3 20.00 16.83 14.54 14.67 15.26 15.39
14.288 1.27 1.5d 21.4 27.15 23.97 14.54 14.67 15.26 15.39
14.288 1.27 2d 28.6 34.29 31.12 14.54 14.67 15.26 15.39
14.288 1.27 2.5d 35.7 41.43 38.26 14.54 14.67 15.26 15.39
14.288 1.27 3d 42.9 48.58 45.40 14.54 14.67 15.26 15.39
14.288 1.27 3.5d 50.0 55.72 52.55 14.54 14.67 15.26 15.39
14.288 1.27 4d 57.2 62.87 59.69 14.54 14.67 15.26 15.39
9/16-24UNEF 0.5630-24 14.288 1.06 1d 14.3 19.05 16.40 14.50 14.60 15.10 15.21
14.288 1.06 1.5d 21.4 26.19 23.55 14.50 14.60 15.10 15.21
14.288 1.06 2d 28.6 33.34 30.69 14.50 14.60 15.10 15.21
14.288 1.06 2.5d 35.7 40.48 37.84 14.50 14.60 15.10 15.21
14.288 1.06 3d 42.9 47.63 44.98 14.50 14.60 15.10 15.21
14.288 1.06 3.5d 50.0 54.77 52.12 14.50 14.60 15.10 15.21
14.288 1.06 4d 57.2 61.91 59.27 14.50 14.60 15.10 15.21
9/16-28UN 0.5630-28 14.288 0.91 1d 14.3 18.37 16.10 14.47 14.56 14.99 15.08
14.288 0.91 1.5d 21.4 25.51 23.25 14.47 14.56 14.99 15.08
14.288 0.91 2d 28.6 32.66 30.39 14.47 14.56 14.99 15.08
14.288 0.91 2.5d 35.7 39.80 37.53 14.47 14.56 14.99 15.08
14.288 0.91 3d 42.9 46.94 44.68 14.47 14.56 14.99 15.08
14.288 0.91 3.5d 50.0 54.09 51.82 14.47 14.56 14.99 15.08
14.288 0.91 4d 57.2 61.23 58.96 14.47 14.56 14.99 15.08
9/16-32UN 0.5630-28 14.288 0.79 1d 14.3 17.86 15.88 14.45 14.52 14.90 14.98
14.288 0.79 1.5d 21.4 25.00 23.02 14.45 14.52 14.90 14.98
14.288 0.79 2d 28.6 32.15 30.16 14.45 14.52 14.90 14.98
14.288 0.79 2.5d 35.7 39.29 37.31 14.45 14.52 14.90 14.98
14.288 0.79 3d 42.9 46.43 44.45 14.45 14.52 14.90 14.98
14.288 0.79 3.5d 50.0 53.58 51.59 14.45 14.52 14.90 14.98
14.288 0.79 4d 57.2 60.72 58.74 14.45 14.52 14.90 14.98
5/8-11UNC 0.6250-11 15.875 2.31 1d 15.9 26.27 20.49 16.33 16.57 17.65 17.88
15.875 2.31 1.5d 23.8 34.20 28.43 16.33 16.57 17.65 17.88
15.875 2.31 2d 31.8 42.14 36.37 16.33 16.57 17.65 17.88
15.875 2.31 2.5d 39.7 50.08 44.31 16.33 16.57 17.65 17.88
15.875 2.31 3d 47.6 58.02 52.24 16.33 16.57 17.65 17.88
15.875 2.31 3.5d 55.6 65.95 60.18 16.33 16.57 17.65 17.88
15.875 2.31 4d 63.5 73.89 68.12 16.33 16.57 17.65 17.88
5/8-12UN 0.6250-12 15.875 2.12 1d 15.9 25.40 20.11 16.30 16.51 17.50 17.71
15.875 2.12 1.5d 23.8 33.34 28.05 16.30 16.51 17.50 17.71
15.875 2.12 2d 31.8 41.28 35.98 16.30 16.51 17.50 17.71
15.875 2.12 2.5d 39.7 49.21 43.92 16.30 16.51 17.50 17.71
15.875 2.12 3d 47.6 57.15 51.86 16.30 16.51 17.50 17.71
15.875 2.12 3.5d 55.6 65.09 59.80 16.30 16.51 17.50 17.71
15.875 2.12 4d 63.5 73.03 67.73 16.30 16.51 17.50 17.71
5/8-16UN 0.6250-16 15.875 1.59 1d 15.9 23.02 19.05 16.19 16.35 17.10 17.25
15.875 1.59 1.5d 23.8 30.96 26.99 16.19 16.35 17.10 17.25
15.875 1.59 2d 31.8 38.89 34.93 16.19 16.35 17.10 17.25
15.875 1.59 2.5d 39.7 46.83 42.86 16.19 16.35 17.10 17.25
15.875 1.59 3d 47.6 54.77 50.80 16.19 16.35 17.10 17.25
15.875 1.59 3.5d 55.6 62.71 58.74 16.19 16.35 17.10 17.25
15.875 1.59 4d 63.5 70.64 66.68 16.19 16.35 17.10 17.25
5/8-18UNF 0.6250-18 15.875 1.41 1d 15.9 22.23 18.70 16.16 16.30 16.96 17.10
15.875 1.41 1.5d 23.8 30.16 26.63 16.16 16.30 16.96 17.10
15.875 1.41 2d 31.8 38.10 34.57 16.16 16.30 16.96 17.10
15.875 1.41 2.5d 39.7 46.04 42.51 16.16 16.30 16.96 17.10
15.875 1.41 3d 47.6 53.98 50.45 16.16 16.30 16.96 17.10
15.875 1.41 3.5d 55.6 61.91 58.38 16.16 16.30 16.96 17.10
15.875 1.41 4d 63.5 69.85 66.32 16.16 16.30 16.96 17.10
11/16-24UNEF 0.6880-24 17.463 1.06 1d 17.5 22.23 19.58 17.67 17.78 18.28 18.38
17.463 1.06 1.5d 26.2 30.96 28.31 17.67 17.78 18.28 18.38
17.463 1.06 2d 34.9 39.69 37.04 17.67 17.78 18.28 18.38
17.463 1.06 2.5d 43.7 48.42 45.77 17.67 17.78 18.28 18.38
17.463 1.06 3d 52.4 57.15 54.50 17.67 17.78 18.28 18.38
17.463 1.06 3.5d 61.1 65.88 63.24 17.67 17.78 18.28 18.38
17.463 1.06 4d 69.9 74.61 71.97 17.67 17.78 18.28 18.38
3/4-10UNC 0.7500-10 19.050 2.54 1d 19.1 30.48 24.13 19.56 19.81 21.00 21.26
19.050 2.54 1.5d 28.6 40.01 33.66 19.56 19.81 21.00