螺纹规格 螺牙距

管螺纹 外螺纹大径 内螺纹小径 R1/8\"-28 9.728 8.566 R1/4\"-19 13.157 11.445 R3/8\"-19 16.663 14.951 R1/2\"-14 20.956 18.632 (R5/8\"-14) 22.912 20.588 R3/4\"-14 26.442 24.119 R1\"-11 33.250 30.292 R1.1/4\"-11 41.912 38.9 R1.1/2\"-11 47.805 44.847 R1.3/4\"-11 53.748 50.791 R2\"-11 59.616 56.659

管螺纹 外螺纹大径 内螺纹小径 G1/8\"-28 9.728 8.386 G1/4\"-19 13.157 11.445 G3/8\"-19 15.862 14.95 G1/2\"-14 20.955 18.531 (G5/8\"-14) 22.911 20.587 G3/4\"-14 26.441 24.117 G1\"-11 33.249 30.291 G1.1/4\"-11 41.91 36.962 G1.1/2\"-11 47.803 44.845 G1.3/4\"-11 53.746 50.788 G2\"-11 59.614 56.556

管螺纹 外径 内径

Z1/8\"-27 10.272 8.766 Z1/4\"-18 13.572 11.314 Z3/8\"-18 17.055 14.797 Z1/2\"-14 21.223 18.321 Z3/4\"-14 26.568 23.666 Z1\"-11.1/2 33.228 29.694 Z1.1/4\"-11.1/2 41.985 38.451 Z1.1/2\"-11.1/2 48.0 44.520 Z2\"-11.1/2 60.092 56.558

UNF

管螺纹 外径 内径

7/16\"-20 11.113 9.9 1/2\"-20 12.700 11.5 9/16\"-18 14.288 12.9

3/4\"-16 19.050 17.5 7/8\"-14 22.225 20.5 1.1/16\"-12 26.988 24.9 1.5/16\"-12 33.338 31.3 1.5/8\"-12 41.275 39.2

SAE 45°

管螺纹 外径 内径

3/8\"-24 9.525 8.6 7/16\"-20 11.113 9.9 1/2\"-20 12.700 11.5 5/8\"-18 15.875 14.2 3/4\"-16 18.900 17.5

55°圆柱管螺纹的型式和尺寸

British Pipe Thread (惠氏管螺纹) -- 圆柱 (BSPP/BSPF) 大径 螺距 中径 小径 mm mm 每英寸牙数 mm 外螺纹 牙型高度 底孔尺寸 螺纹代号 基本尺寸 d=D p tpi d2=D2 d3 H1 mm G 1/8 1/8＂ 9.728 0.907 G 1/4 1/4＂ 13.157 1.337 G 3/8 3/8＂ 16.662 1.337 G 1/2 1/2＂ 20.955 1.814 G 5/8 5/8＂ 22.911 1.814 G 3/4 3/4＂ 26.441 1.814 G 7/8 7/8＂ 30.201 1.814 G 1 1＂ 33.249 2.309 G 1 1/8 1 1/8＂ 37.7 2.309 G 1 1/4 1 1/4＂ 41.91 2.309 G 1 3/8 1 3/8＂ 44.323 2.309 G 1 1/2 1 1/2＂ 47.803 2.309 G 1 3/4 1 3/4＂ 53.746 2.309 G 2 2＂ 59.614 2.309 G 2 1/4 2 1/4＂ 65.71 2.309 G 2 1/2 2 1/2＂ 75.184 2.309 G 2 3/4 2 3/4＂ 81.534 2.309 G 3 3＂ 87.884 2.309 G 3 1/4 3 1/4＂ 93.98 2.309 G 3 1/2 3 1/2＂ 100.33 2.309 G 3 3/4 3 3/4＂ 106.68 2.309 G 4 G 5 G 6

28 19 19 14 14 14 14 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 9.147 8.566 15.806 14.95 0.581 0.856 8.7 11.6 15 19 12.301 11.445 0.856 19.793 18.631 1.162 21.749 20.587 1.162 25.279 24.117 1.162 29.039 27.877 1.162 31.77 30.291 1.479 36.418 34.939 1.479 40.431 38.952 1.479 42.844 41.365 1.479 46.324 44.845 1.479 52.267 50.788 1.479 58.135 56.656 1.479 .231 62.752 1.479 73.705 72.226 1.479 80.055 78.576 1.479 86.405 84.926 1.479 92.501 91.022 1.479 98.351 97.372 1.479 105.201 103.722 1.479 111.55 110.072 1.479 124.251 122.772 1.479 136.951 135.472 1.479 149.651 148.172 1.479 162.351 160.872 1.479 20.75 24.5 28 35 30.5 39.5 41.5 45 51 57 63 79 91 72.5 85.5 97.75 104 110.5 123 136 148.5 161.5 4＂ 113.03 2.309 5＂ 138.43 2.309 6＂ 163.83 2.309 G 4 1/2 4 1/2＂ 125.73 2.309 G 5 1/2 5 1/2＂ 151.13 2.309