55° 圆锥管螺纹 (BSPT)螺纹代号基本尺寸英寸大径mm d=D 螺距mm p 每英寸牙数tpi 中径mm d2=D2 小径外螺纹d3 牙型高度H1 圆弧尺寸r 底孔尺寸mm R 1/16 1/16" 7.723 0.907 28 7.142 6.561 0.581 0.125 6.4 R 1/8 1/8" 9.728 0.907 28 9.147 8.566 0.581 0.125 8.4 R 1/4 1/4" 13.157 1.337 19 12.301 11.445 0.856 0.184 11.2 R 3/8 3/8" 16.662 1.337 19 15.806 14.950 0.856 0.184 14.75 R 1/2 1/2" 20.955 1.814 14 19.793 18.631 1.162 0.249 18.25 R 3/4 3/4" 26.441 1.814 14 25.279 24.117 1.162 0.249 23.75 R 1 1" 33.249 2.309 11 31.77 30.291 1.479 0.317 30 R 1 1/4 1 1/4" 41.910 2.309 11 40.431 38.952 1.479 0.317 38.5 R 1 1/2 1 1/2" 47.803 2.309 11 46.324 44.845 1.479 0.317 44.5 R 2 2" 59.614 2.309 11 58.135 56.656 1.479 0.317 56 R 2 1/2 2 1/2" 75.184 2.309 11 73.705 72.226 1.479 0.317 71 R 3 3" 87.884 2.309 11 86.405 84.926 1.479 0.317 85.5 R 4 4" 113.030 2.309 11 111.551 110.072 1.479 0.317 110.5 R 5 5" 138.430 2.309 11 136.951 135.472 1.479 0.317 136 R 6 6" 163.830 2.309 11 162.351 160.872 1.479 0.317 161.5 管螺纹尺寸表55° 圆柱管螺纹的型式和尺寸British Pipe Thread (惠氏管螺纹 ) -- 圆柱 (BSPP/BSPF)螺纹代号基本尺寸大径mm d=D螺距mm p每英寸牙数tpi中径mm d2=D2小径外螺纹d3牙型高度H1底孔尺寸mmG 1/8 1/8"9.7280.907289.1478.5660.5818.7G 1/4 1/4"13.1571.3371912.30111.4450.85611.6G 3/8 3/8"16.6621.3371915.80614.950.85615G 1/2 1/2"20.9551.8141419.79318.6311.16219G 5/8 5/8"22.9111.8141421.74920.5871.16220.75G 3/4 3/4"26.4411.8141425.27924.1171.16224.5G 7/8 7/8"30.2011.8141429.03927.8771.16228G 1 1"33.2492.3091131.7730.2911.47930.5G 1 1/8 1 1/8"37.8972.3091136.41834.9391.47935G 1 1/4 1 1/4"41.912.3091140.43138.9521.47939.5G 1 3/8 1 3/8" 44.3232.3091142.84441.3651.47941.5G 1 1/2 1 1/2"47.8032.3091146.32444.8451.47945G 1 3/4 1 3/4"53.7462.3091152.26750.7881.47951G 2 2"59.6142.3091158.13556.6561.47957G 2 1/4 2 1/4"65.712.3091164.23162.7521.47963G 2 1/2 2 1/2"75.1842.3091173.70572.2261.47972.5G 2 3/4 2 3/4"81.5342.3091180.05578.5761.47979G 3 3"87.8842.3091186.40584.9261.47985.G 3 1/4 3 1/4"93.982.3091192.50191.0221.47991G 3 1/2 3 1/2"100.332.3091198.35197.3721.47997.75G 3 3/4 3 3/4"106.682.30911105.201 103.7221.479104G 4 4"113.032.30911111.55 110.0721.479110.5G 4 1/2 4 1/2"125.732.30911124.251 122.7721.479123G 55"138.432.30911136.951 135.4721.479136G 5 1/2 5 1/2"151.132.30911149.651 148.1721.479148.5G 6 6"163.832.30911162.351 160.8721.479161.5
