管螺纹尺寸对照表
各国标准螺纹基本尺寸对照表
英制管螺纹基本尺寸及公差（牙形角55º）BSPP之宇文皓月创作英制锥管螺纹基本尺寸及公差（牙形角55º）BSPT美制管螺纹基本尺寸及公差（牙形角60º）UN(F)布锥管螺纹基本尺寸及公差(牙形角60º)NPT公制螺纹基本尺寸及公差(牙形角60º)M55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹(BSPT)6 0 09 1 872聊城市鑫茂祥管业有限公司专业经营钢管规格：5mm*1mm—1020mm*200mm 合金钢管、外径22mm-127mm冷轧无缝钢管、外径127mm-600mm，壁厚16mm-100mm，外径精度±0.5%,壁厚精度±5%热轧中厚壁无缝钢管、16Mn 外径400—1600mm、壁厚20—60mm的大口径厚壁卷管，可定尺到16米及各种规格的无缝方管、异型无缝钢管等.常备钢管种类有:构造用无缝钢管、流体用无缝钢管、液压无缝钢管、电力用无缝钢管、石油输送用无缝钢管、化肥设备用无缝钢管、煤矿用无缝钢管、不锈钢无缝钢管、化工用无缝钢管、纺织机械用无缝钢管、汽车；水利用无缝钢管，精密无缝钢管、光亮无缝钢管、军工医疗用无缝钢管、管道用无缝钢管、支柱用无缝钢管、合金无缝管、高压无缝管、大口径直缝焊管等。
适用于工程、煤矿、纺织、电力、锅炉、机械、军工等各个领域。
公司以良好的信用、优质的产品、雄厚的实力、低廉的价钱享誉全国30多个省、市、自治区、直辖市及国外，产品深得用户依赖。
管螺纹的基本尺寸表(2010-10-25 15:57:35)标签：杂谈表（1）螺纹基本尺寸G1/2 、ZG1/2 (单位:mm)尺寸代每螺距p 牙型圆弧半基面上的基本直径基准有效锥管螺纹的基本尺寸表（3-28）1/2PT 、1/2NPT 表（2）螺纹基本尺寸 (单位:mm)螺纹尺度的一种，按外形分圆柱、圆锥两种；按牙型角分55°、60°两种。
管螺纹尺寸对照表(全)
11
2.309
1.479
2寸
DN50
2
60.3
3.8
3.325
11Βιβλιοθήκη 2.3091.479
2.5寸 DN65
2.1/2
76.1
4
3.5
11
2.309
1.479
3寸
DN80
3
88.9
4
11
2.309
1.479
3.5寸
3.1/2
11
2.309
1.479
4寸
DN100
4
114.3
4
11
2.309
1.479
5寸
2 2.1/2
3 3.1/2
4
锥管螺纹的基本尺寸表（3-28）1/2PT 、
、
每25.4mm 类的牙数n
基面上的基本直径
大径（基准 直径）d=D
中径d2=D2
27
7.895
7.142
27
10.242
9.489
18
13.616
12.487
18
17.055
15.926
14
21.223
19.772
14
26.568
大径（基准 直径）d=D
中径d2=D2
小径d1=D1
0.125
7.723
7.142
6.561
0.125
9.728
9.147
8.566
0.184
13.157
12.301
11.445
0.184
16.662
15.806
14.950
0.249
20.955
(完整版)螺纹基本尺寸对照表(最新整理)
英制管螺纹基本尺寸及公差（牙形角55º）BSPP基本直径内螺纹外螺纹A级B级螺纹代号大径中径小径中径公差小径公差中径公差大径公差中径公差大径公差G1/8″×289.7289.1478.566+0.170+0.282-0.107-0.214-0.214-0.214G1/4″×1913.15712.30111.445+0.125+0.445-0.125-0.250-0.2500-0.250G3/8″×1916.66215.80614.950+0.125+0.445-0.125-0.250-0.250-0.250G1/2″×1420.95519.79318.631+0.142+0.541-0.142-0.284-0.284-0.284G5/8″×1422.91121.74920.587+0.142+0.541-0.142-0.284-0.284-0.284G3/4″×1426.44125.27924.117+0.142+0.541-0.142-0.284-0.284-0.284G1″×1133.24931.77030.291+0.180+0.640-0.180-0.360-0.360-0.360G1.1/4″×1141.91040.43138.952+0.180+0.640-0.180-0.360-0.360-0.360G1.1/2″×1147.80346.32444.854+0.180+0.640-0.180-0.360-0.360-0.360G2″×1159.61458.13556.656+0.180+0.640-0.180-0.360-0.360-0.360G2.1/2”X1175.18473.70572.226+0.217+0.640-0.217-0.434-0.434-0.434G3”X1187.88486.40584.926+0.217+0.640-0.217-0.434-0.434-0.434G3.1/2”X11100.33098.85197.372+0.217+0.640-0.217-0.434-0.434-0.434英制锥管螺纹基本尺寸及公差（牙形角55º）BSPT基面上的直径基准长度有效螺纹长度螺纹代号大径中径小径基本最大最小基本最大最小圆锥内螺纹基面轴向位移偏差（±mm）R1/8″×289.7289.1478.566 4.0 4.9 3.1 6.57.4 5.6 1.1 R1/4″×1913.15712.30111.445 6.07.3 4.79.711.08.4 1.7 R3/8″×1916.66215.80614.950 6.47.7 5.110.111.48.8 1.7 R1/2″×1420.95519.79318.6318.210.0 6.413.215.011.4 2.3 R3/4″×1426.44125.27924.1179.511.37.714.516.312.7 2.3 R1″×1133.24931.77030.29110.412.78.116.819.114.5 2.9 R1.1/4″×1141.91040.43138.95212.715.010.419.121.416.8 2.9 R1.1/2″×1147.80346.32444.84512.715.010.419.121.416.8 2.9 R2″×1159.61458.13556.65615.918.213.623.425.721.1 2.9 R2.1/2”X1175.18473.70572.22617.521.014.026.730.223.2 3.5 R3”X1187.88486.40584.92620.624.117.129.833.326.3 3.5R3.1/2”X11100.33098.85197.37222.225.718.731.434.927.9 3.5美制管螺纹基本尺寸及公差（牙形角60º）UN(F)外螺纹内螺纹公差等级公差等级2A2B 螺纹代号大径中径小径小径中径大径最大最小最大最小最小最大最小最大JIC螺纹7/16″×20UNF11.07910.87410.25410.1479.5689.72810.03310.28710.42411.113 1/2″×20UNF12.66712.46111.84111.73211.15611.32811.60811.87512.01712.7 9/16″×18UNF14.25214.03113.33513.22112.57312.75113.08113.37113.5214.288 3/4″×16UNF19.01218.77317.98117.85417.1217.32317.67818.01918.18419.05 7/8″×14UNF22.18421.92321.00620.86920.02520.26920.67621.04621.22422.225 1-1/16″×12UN26.94426.65525.5725.42524.42524.68925.14625.61325.80126.988 1-5/16″×12UN33.29433.00531.9231.77330.77531.03931.49631.96332.15433.338 1-5/8″×12UN41.22940.9439.88539.70538.7138.98939.44639.90140.09441.275 1-7/8″×12UN47.57947.2946.20546.05345.0645.33945.79646.25146.44947.625 2-1/2″×12UN63.45263.16262.07861.9260.93261.21461.67162.12662.33263.5ORFS螺纹9/16″×18UNF14.25214.03113.33513.22112.57312.75113.08113.37113.5214.288 11/16″×16UN17.42717.18816.39616.27415.53515.74816.10416.43116.58917.463 13/16″×16UN20.59920.36119.56819.44418.70718.92319.27919.60619.76620.638 1″×14UNF25.35725.09524.17824.03623.19523.44423.82524.22124.40725.4 1-3/16″×12UN30.11929.8328.74528.59827.627.86428.32128.78828.97930.163 1-7/16″×12UN36.46736.17735.09334.94333.94734.21434.67135.13835.33136.513 1-11/16″×12UN42.81742.52741.44341.2940.29740.56441.02141.48841.68642.863 2″×12UN50.75450.46549.3849.22548.23548.51448.97149.42649.62750.8SAE螺纹5/8″×18UNF15.83915.61814.92314.80314.16114.35114.68114.95815.1115.875 1-1/16″×14UN26.94726.68325.74325.60824.7424.96825.37525.78325.96126.987其它美制螺纹9/16″×16UN14.25214.01313.22113.10112.3612.57312.92913.25613.41114.288 7/8″×12UN22.18221.89220.80820.66819.66219.93920.39620.85121.03422.225 2-1/4″×12UN57.10456.81555.7355.57554.58554.86455.32155.77655.97657.15注：UNC粗牙螺纹系列，UNF细牙螺纹系列，UNEF超细牙螺纹系列，UN不变螺距系列布锥管螺纹基本尺寸及公差(牙形角60º) NPT基面上的直径螺纹长度螺纹代号大径中径小径有效长度管端至基面长Z1/8″×2710.2729.5198.7667 4.572 Z1/4″×1813.57212.44311.3149.5 5.080 Z3/8″×1817.05515.92614.79710.5 6.096 Z1/2″×1421.22319.77218.32113.58.028 Z3/4″×1426.56825.11723.666148.611 Z1″×11.533.22831.46129.69417.510.160Z1.1/4″×11.541.98540.21838.4511810.688Z1.1/2″×11.548.05446.28744.52018.510.688Z2″×11.560.09258.32556.5581911.074公制螺纹基本尺寸及公差(牙形角60º) M基本直径内 螺 纹外螺纹公 差 等 级公差等级6H7H6g螺纹代号大 径中 径小 径中径公差小径公差中径公差小径公差中径公差大径公差M10X1109.3508.917+0.1500+0.2360+0.1900+0.3000-0.026-0.138-0.026-0.206M12X11211.35010.917+0.1600+0.2360+0.2000+0.3000-0.026-0.144-0.026-0.206M14X11413.35012.917+0.1600+0.2360+0.2000+0.3000-0.026-0.144-0.026-0.206M12X1.251211.18810.647+0.1800+0.2650+0.2240+0.3350-0.028-0.160-0.028-0.240M14X1.251413.18812.647+0.1800+0.2650+0.2240+0.3350-0.028-0.160-0.028-0.240M12X1.51211.02610.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M14X1.51413.02612.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M16X1.51615.02614.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M18X1.51817.02616.373+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M20X1.52019.02618.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M22X1.52221.02620.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M24X1.52423.02622.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M26X1.52625.02624.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M27X1.52726.02625.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M30X1.53029.02628.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M33X1.53332.02631.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M36X1.53635.02634.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M39X1.53938.02637.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M42X1.54241.02640.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M27X22725.70124.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M30X23028.70127.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M33X23331.70130.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M36X23634.70133.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M39X23937.70136.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M42X24240.70139.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M45X24543.70142.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M52X25250.70149.835+0.2360+0.3750+0.3000+0.4750-0.038-0.218-0.038-0.318M60X26058.70157.835+0.2360+0.3750+0.3000+0.4750-0.038-0.218-0.038-0.318M64X26462.70161.835+0.2360+0.3750+0.3000+0.4750-0.038-0.218-0.038-0.318M72X27270.70169.835+0.2360+0.3750+0.3000+0.4750-0.038-0.218-0.038-0.318。
管螺纹尺寸对照表 全
15.926 19.772 25.117 31.461 40.218 46.287 58.325 70.159 86.068 98.776 111.433
14.797 18.321 23.666 29.694 38.451 44.520 56.558 67.619 83.528 96.236 108.893
0.184 16.662 15.806 14.950 6 0.249 20.955 19.793 18.631 8
1.162
0.249 26.441 25.279 24.117 10
1.479 1.479
0.317 33.249 31.770 30.291 10 0.317 41.910 40.431 38.952 13
27
1/8
27
1/4
18
3/8
18
1/2
14
3/4
14
1
12
1.1/4
12
1.1/2
12
2
12
2.1/2
8
3
8
3.1/2
8
4
8
3-29）G1/2 、ZG1/2 、（以焊管、镀锌管为例）
螺距p
0.907 0.907 1.337 1.337 1.814 1.814 2.309 2.309 2.309 2.309 2.309 2.309 2.309 2.309 2.309 2.309
DN100 DN125 DN150 DN200 DN250
1/16
28
1/8
28
1/4
19
3/8
19
1/2 21.3 2.8 2.45
14
3/4 26.9 2.8 2.45
螺纹基本尺寸对照表
英制管螺纹基本尺寸及公差（牙形角55º）BSPP英制锥管螺纹基本尺寸及公差（牙形角55º）BSPT美制管螺纹基本尺寸及公差（牙形角60º）UN(F)布锥管螺纹基本尺寸及公差(牙形角60º)NPT公制螺纹基本尺寸及公差(牙形角60º)M55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹(BSPT)聊城市鑫茂祥管业XX专业经营钢管规格：5mm*1mm—1020mm*200mm合金钢管、外径22mm-127mm冷轧无缝钢管、外径127mm-600mm，壁厚16mm-100mm，外径精度±0.5%,壁厚精度±5%热轧中厚壁无缝钢管、16Mn外径400—1600mm、壁厚20—60mm的大口径厚壁卷管，可定尺到16米及各种规格的无缝方管、异型无缝钢管等.常备钢管种类有:构造用无缝钢管、流体用无缝钢管、液压无缝钢管、电力用无缝钢管、石油输送用无缝钢管、化肥设备用无缝钢管、煤矿用无缝钢管、不锈钢无缝钢管、化工用无缝钢管、纺织机械用无缝钢管、汽车；水利用无缝钢管，精密无缝钢管、光亮无缝钢管、军工医疗用无缝钢管、管道用无缝钢管、支柱用无缝钢管、合金无缝管、高压无缝管、大口径直缝焊管等。
适用于工程、煤矿、纺织、电力、锅炉、机械、军工等各个领域。
公司以良好的信用、优质的产品、雄厚的实力、低廉的价钱享誉全国30多个省、市、自治区、直辖市及国外，产品深得用户依赖。
公司常年销售XX钢铁集团、冶钢集团、XX钢厂、宝钢集团、鞍钢集团、XX大无缝、XX特钢厂、XX钢厂、XX钢厂等各大钢厂生产的各种无缝钢管及合金管。
主营材质：20#、35#、45#、20G、20A、40Mn2、45Mn2、27SiMn、40MnB、20MnVB、20Cr、30Cr、35Cr、40Cr、45Cr、50Cr、38CrSi、12CrMo 、20CrMo、35CrMo、42CrMo、12CrMoV、12Cr1MoV、38CrMoAL、50CrV、20CrMnSi、30CrMnSi、35CrMnSi、20CrMnTi、30CrMnTi、12CrNi2、12CrNi3、12Cr2Ni4、40CrNiMoA、45CrNiMoVA、20G、20MnG、25MnG、12CrMoG、15CrMoG、12Cr2MoG、12Cr1MoVG、12Cr2MoWVTiB、12Cr3MoVSiTiB等实行标准：GB/T8162-99构造管、GB/T8163-99流体管、GB/T3087-99中低压锅炉管、GB/T5310-95高压锅炉管、GB/T6479-2000化肥专用管、27SiMn液压支架管、高压合金管、GB/T9948-85石油裂化管GB9948-88、地质钻探用管YB235-70、汽车半轴套管YB/T5035-96。
管螺纹尺寸对照表(全)
11
2.309
1.479
2寸
DN50
2
60.3
3.8
3.325
11
2.309
1.479
2.5寸 DN65
2.1/2
76.1
4
3.5
11
2.309
1.479
3寸
DN80
3
88.9
4
11
2.309
1.479
3.5寸
3.1/2
11
2.309
1.479
4寸
DN100
4
114.3
4
11
2.309
1.479
5寸
大径（基准 直径）d=D
中径d2=D2
小径d1=D1
0.125
7.723
7.142
6.561
0.125
9.728
9.147
8.566
0.184
13.157
12.301
11.445
0.184
16.662
15.806
14.950
0.249
20.955
19.793
18.631
0.249
26.441
25.279
24.117
0.317
33.249
31.770
30.291
0.317
41.910
40.431
38.952
0.317
47.803
46.324
44.845
0.317
59.614
58.135
56.656
0.317
75.184
73.705
72.226
0.317
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1 3/8＂ 44.323 2.309 11 42.844 41.365 1.479
1 1/2＂ 47.803 2.309 11 46.324 44.845 1.479
1 3/4＂ 53.746 2.309 11 52.267 50.788 1.479
底孔尺 寸 mm 8.7 11.6 15 19
20.75 24.5 28 30.5 35 39.5 41.5 45 51
7/8＂ 30.201 1.814 14 29.039 27.877 1.162
1＂ 33.249 2.309 11
31.77 30.291 1.479
1 1/8＂ 37.897 2.309 11 36.418 34.939 1.479
1 1/4＂ 41.91 2.309 11 40.431 38.952 1.479
7.034 6.131 0.904 6.50
3/8＂ BSW 9.525 1.588 16
8.509 7.492 1.017 7.90
7/16＂ BSW 11.113 1.814 14
9.951 8.789 1.162 9.20
1/2＂ BSW 12.700 2.117 12 11.345 9.990 1.355 10.40
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
G 3 1/2 3 1/2＂ 100.33 2.309 11 98.351 97.372 1.479 97.75
G 3 3/4 3 3/4＂ 106.68 2.309 11 105.201 103.722 1.479 104
G4
4＂ 113.03 2.309 11 111.55 110.072 1.479 110.5
British Pipe Thread (惠氏管螺纹) -- 圆柱 (BSPP/BSPF)
大径 螺距 每英寸牙 中径 小径 牙型高
基本尺 mm mm 数
mm 外螺纹 度
寸 d=D p
tpi d2=D2 d3
H1
1/8＂ 9.728 0.907 28
9.147 8.566 0.581
1/4＂ 13.157 1.337 19 12.301 11.445 0.856
1/2
BSF 12.700 1.588 16 11.684 10.668 1.017 11.10
9/16 BSF 14.288 1.588 16 13.272 12.256 1.017 12.70
5/8
BSF 15.875 1.814 14 14.712 13.549 1.162 14.00
57.152 6.350 63.502 6.350 69.853 7.257 76.203 7.257 82.553 7.816 88.903 7.816 95.254 8.467 101.604 8.467 107.954 8.835 114.304 8.835 120.665 9.237 127.005 9.237 133.355 9.677 139.705 9.677 146.055 10.160 152.406 10.160
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
3/16＂ BSW 4.762 1.058 24
4.084 3.407 0.677 3.70
7/32＂ BSW 5.556 1.058 24
4.878 4.201 0.677 4.50
1/4＂ BSW 6.350 1.270 20
5.537 4.724 0.813 5.10
5/16＂ BSW 7.938 1.411 18
55°圆锥管螺纹型式和尺寸
基本尺 大径 螺距 每英寸 中径 小径 牙型高 圆弧尺 底孔尺
螺纹代
号
寸 mm mm 牙数 mm 外螺纹 度
寸
寸
英 寸 d=D p tpi d2=D2 d3 H1
r
mm
R 1/16 1/16＂ 7.723 0.907 28 7.142 6.561 0.581 0.125 6.4
1 1/2＂ BSW 38.100 4.233
6
35.391 32.680 2.711 33.50
1 5/8＂ BSW 41.277 5.080
5
38.024 34.771 3.253 35.50
1 3/4＂ BSW 44.452 5.080
5
41.199 37.946 3.253 38.50
1 7/8＂ BSW 47.627 5.645 4 1/2 44.012 40.398 3.614 41.25
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
8
23.368 21.335 2.033 22.00
1 1/8＂ BSW 28.576 3.629
7
26.253 23.929 2.324 24.50
1 1/4＂ BSW 31.751 3.629
7
29.428 27.104 2.324 27.25
1 3/8＂ BSW 34.926 4.233
6
32.215 29.505 2.711 30.25
3/8＂ 16.662 1.337 19 15.806 14.95 0.856
1/2＂ 20.955 1.814 14 19.793 18.631 1.162
5/8＂ 22.911 1.814 14 21.814 14 25.279 24.117 1.162
G 2 3/4 2 3/4＂ 81.534 2.309 11 80.055 78.576 1.479 79
G3
3＂ 87.884 2.309 11 86.405 84.926 1.479 85.5
G 3 1/4 3 1/4＂ 93.98 2.309 11 92.501 91.022 1.479 91
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
55°圆柱管螺纹的型式和尺寸
螺纹代 号
G 1/8 G 1/4 G 3/8 G 1/2 G 5/8 G 3/4 G 7/8 G1 G 1 1/8 G 1 1/4 G 1 3/8 G 1 1/2 G 1 3/4
BSF 牙型代号 d=D p
tpi d2=D2 d3 H1 mm
3/16 BSF 4.763 0.794 32
4.255 3.747 0.508 4.00
7/32 BSF 5.556 0.907 28
4.975 4.394 0.581 4.60
1/4
BSF 6.350 0.977 26
5.725 5.100 0.625 5.30
1.315 1.050 0.270 1.15
3/32＂ BSW 2.381 0.529 48
2.041 1.703 0.338 1.90
1/8＂ BSW 3.175 0.635 40
2.768 2.362 0.406 2.50
5/32＂ BSW 3.969 0.793 32
3.459 2.952 0.507 3.20
5/8＂ BSW 15.876 2.309 11 14.397 12.918 1.479 13.40
3/4＂ BSW 19.051 2.540 10 17.424 15.798 1.627 16.25
7/8＂ BSW 22.226 2.822
9
20.419 18.611 1.807 19.25
1＂ BSW 25.400 3.175
50.00 56.00 61.50 68.00 73.75 80.00 85.50 92.00 98.00 104.20 110.00 116.50 122.50 128.50 134.50 141.00
英制普通螺纹 (惠氏螺纹) -- 细牙 (BSW)
大径 螺距
中径 小径
名义尺寸
mm mm 每英寸牙数 mm 外螺纹 牙型高 底孔直径
G 4 1/2 4 1/2＂ 125.73 2.309 11 124.251 122.772 1.479 123
G5
5＂ 138.43 2.309 11 136.951 135.472 1.479 136
G 5 1/2 5 1/2＂ 151.13 2.309 11 149.651 148.172 1.479 148.5
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