螺纹公差对照表
螺纹符号尺寸公差对照表
螺纹代号对照表国外螺纹的代号和标注识别1.英制螺纹(螺纹牙型角 55 度)BSW----英国标准惠氏螺纹(粗牙) BSF --- 英国标准惠氏螺纹(细牙)R----锥管外螺纹(旧代号ZG、KG) RC -- 锥管内螺纹(旧代号ZG、KG)G - 直管螺纹(外螺纹分A、B 两面级,丝锥分 G、G-D)2.美制螺纹(螺纹牙型 60 度)UNC---统一制粗牙螺纹(代替NC)UNF -- 统一制细牙螺纹(代替NF)UNEF---统一制超细牙螺纹UN - 统一制不变螺距螺纹UNS---统一制特殊螺纹NPT -- 美国标准锥管螺纹NPSC---美国标准管接头用直管螺纹NGT -- 气瓶用锥螺纹NPTF---干密封锥管螺纹NPSF -- 干密封燃油直管螺纹NPSM---美国标准机械连接用直管螺纹NPTR - 美国标准导杆采用锥管螺纹NPSL---美国标准管锁紧螺母用直管螺纹NPSH -- 美国标准软管连接用直管螺纹3.其它螺纹SM----缝纫机螺纹PZ --- 气瓶用锥螺纹51-201-气门芯螺纹标注示例55°圆柱管螺纹是非螺纹密封管螺纹,属惠氏螺纹家族。
米制和英寸制国家均广泛采用。
用于输送液体、气体、和安装电线的管接头和管子的连接。
国家标准可查阅 GB/T7307-2001。
完整的标记由螺纹特征代号(G)、螺纹尺寸代号、中径公差等级代号(内螺纹省略不标注,外螺纹代号为A 和B)和旋向代号组成:尺寸代号为 3/4 的A 级、右旋、非密封圆柱外螺纹标注为:G3/4A螺纹中的 3/8、1/2、3/4 标记是指螺纹尺寸的直径,单位是英寸。
行内人通常用“分” 来称呼螺纹尺寸,一寸等于 8 分,1/2 寸就是4 分,以此类推55°圆锥管螺纹是螺纹密封管螺纹,属惠氏螺纹家族。
该系列螺纹在世界上应用广泛,常用于水及煤气管行业。
锥度规定为 1:16.国家标准可查阅 GB/T7306-2000。
完整的标记由螺纹特征代号、螺纹尺寸代号和旋向代号组成:英制密封圆柱内螺纹的特征代号为R P;英制密封圆锥内螺纹的特征代号为R C;英制密封圆锥外螺纹的特征代号为R1(与英制密封圆柱内螺纹配合使用)R2(与英制密封圆锥内螺纹配合使用)尺寸代号为 3/4 的左旋、英制密封圆柱内螺纹:R P3/4-LH英制密封管螺纹有两种配合方式,“柱/锥”和“锥/锥”.两种英制密封管螺纹使用不同的螺纹环规(圆柱螺纹环规和圆锥螺纹环规)和螺纹塞规(基准平面的位置不同,两者基准平面相距半牙).欧洲国家主要采用“柱/锥”配合螺纹;而欧洲以外国家则主要采用“锥/ 锥”配合螺纹.同一个密封管螺纹件,欧洲国家检验合格的管螺纹,欧洲以外国家检验则可能不合格.国际贸易中一定要注意这种差异否则可能出现废品.1994 年前,ISO 的英制密封管螺纹标准及其量规标准是按“锥/锥”配合体系设计的.我国的英制密封管螺纹产品可以直截进入国际市场.而欧洲国家的管螺纹的管螺纹产品则处于不利的地位.2000 年以后,ISO 的英制密封管螺纹标准及其量规标准是按“柱/锥”配合题系设计的.我国原有的英制密封管螺纹产品进入国际市场就会遇到困难.为此,我国于 2000 年修订了英制密封管螺纹国家标准.将原来的一个螺纹标准变为两个螺纹标准,以此提示设计者要注意两种配合螺纹的不同和正确选用. 日本在 1999 年修定英制密封管螺纹标准时,仍然坚持采用 1994 年前的 ISO 标准.所以, 2000 年以后的国际英制密封管螺纹市场更加复杂,国内厂家要备加小心.英制密封管螺纹有两种配合方式:圆柱内螺纹与圆锥外螺纹组成“柱/锥”配合;圆锥内螺纹与圆锥外螺纹组成“锥/锥”配合. 目前的 ISO 英制密封管螺纹量规标准(ISO 7-2:2000)是按“柱/锥”配合体系设计的. 对密封管螺纹,利用 RP/R1,RC/R2 分别表示“柱/锥” 和“锥/锥”螺纹副。
螺纹符号尺寸公差对照表
如 M10、M16 等;细牙普通螺纹用螺纹代号(M)和公称直径×螺距表示,如 M10×1、
M20×1.5 等。完整的螺纹标记是由螺纹特征代号和公差带代号及旋合长度代号组成的,如
M20×1.5-6g-S。M:螺纹代号;20:公称直径;1.5:螺纹导程;6g:公差带等级;S: 旋合长度(中等旋合长度不标注)。
5H/6H/7H
最小
3.242 4.134 4.917 6.647 8.917 8.647 8.376 10.376 10.106 12.376 11.835 14.376 13.835 16.376 15.294 18.375 17.294
推荐麻花 钻直径
3.3 4.2 5 6.8 9 8.8 8.5 10.5 10.2 12.5 12 14.5 14 16.5 15.5 18.5 17.5
英制密封管螺纹有两种配合方式:圆柱内螺纹与圆锥外螺纹组成“柱/锥”配合;圆锥内 螺纹与圆锥外螺纹组成“锥/锥”配合. 目前的 ISO 英制密封管螺纹量规标准(ISO 7-2: 2000)是按“柱/锥”配合体系设计的. 对密封管螺纹,利用 RP/R1,RC/R2 分别表示“柱 /锥” 和“锥/锥”螺纹副。
基本偏差用于特殊场合,如较厚的镀层,一般很少用。
2、g 常用来镀 6-9um 的薄镀层,如产品图纸要求是 6h 的螺栓,其镀前螺纹采用 6g
的公差带。
3、螺纹配合最好组合成 H/g、H/h 或 G/h,对于螺栓、螺母等精制紧固件螺纹,标
准 推荐采用 6H/6g 的配合。
4/8
基本大径/mm >≤ 2.8 5.6 5.6 11.2
-180
6G
+293
+28
6e
-63
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)BSPP55°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)2 6R 44"113.032.30911111.551110.721.479R 55"138.432.30911136.951135.4721.479R 66"163.832.30911162.351160.8721.479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。
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管螺纹的基本尺寸表(2010-10-25 15:57:35) 转载▼标签:杂谈表(1)螺纹基本尺寸G1/2 、ZG1/2 (单位:mm)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。
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螺纹代号G1/8″×28G1/4″×19G3/8″×19G1/2″×14G5/8″×14G3/4″×14G1″×11G1.1/4″×11G1.1/2″×11G2″×11G2.1/2”X11G3”X11G3.1/2”X11基本直径内螺纹外螺纹A级B级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9.7289.1478.566+0.170+0.28200000-0.107-0.214-0.214-0.214 13.15712.30111.445+0.125+0.445-0.125-0.250-0.2500-0.250 16.66215.80614.950+0.125+0.445000000-0.125-0.250-0.250-0.250 20.95519.79318.631+0.142+0.541000000-0.142-0.284-0.284-0.284 22.91121.74920.587+0.142+0.541000000-0.142-0.284-0.284-0.284 26.44125.27924.117+0.142+0.541000000-0.142-0.284-0.284-0.284 33.24931.77030.291+0.180+0.640000000-0.180-0.360-0.360-0.360 41.91040.43138.952+0.180+0.640000000-0.180-0.360-0.360-0.360 47.80346.32444.854+0.180+0.640000000-0.180-0.360-0.360-0.360 59.61458.13556.656+0.180+0.640000000-0.180-0.360-0.360-0.360 75.18473.70572.226+0.217+0.640000000-0.217-0.434-0.434-0.434 87.88486.40584.926+0.217+0.640000000-0.217-0.434-0.434-0.434 100.33098.85197.372+0.217+0.640000000-0.217-0.434-0.434-0.434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圆锥内螺纹基面轴向螺纹代号大径中径小径基本最大最小基本最大最小位移误差(±mm)R1/8″×289.7289.1478.566 4.0 4.9 3.1 6.57.4 5.6 1.1R1/4″×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 1.7R1/2″×1420.95519.79318.6318.210.0 6.413.215.011.4 2.3R3/4″×1426.44125.27924.1179.511.37.714.516.312.7 2.3 R1″×1133.24931.77030.29110.412.78.116.819.114.5 2.9R1.1/4″×1141.91040.43138.95212.715.010.419.121.416.8 2.9R1.1/2″×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)螺纹代号7/16″×20UNF1/2″×20UNF9/16″×18UN F3/4″×16UNF7/8″×14UNF1-1/16″×12UN1-5/16″×12UN1-5/8″×12UN1-7/8″×12UN2-1/2″×12UN9/16″×18UNF11/16″×16UN13/16″×16UN1″×14UNF1-3/16″×12UN1-7/16″×12UN1-11/16″×12UN2″×12UN5/8″×18UNF1-1/16″×14UN外螺纹内螺纹公差等级公差等级2A2B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11.07910.87410.25410.1479.5689.72810.03310.28710.42411.11312.66712.46111.84111.73211.15611.32811.60811.87512.01712.7 14.25214.03113.33513.22112.57312.75113.08113.37113.5214.288 19.01218.77317.98117.85417.1217.32317.67818.01918.18419.05 22.18421.92321.00620.86920.02520.26920.67621.04621.22422.225 26.94426.65525.5725.42524.42524.68925.14625.61325.80126.988 33.29433.00531.9231.77330.77531.03931.49631.96332.15433.338 41.22940.9439.88539.70538.7138.98939.44639.90140.09441.275 47.57947.2946.20546.05345.0645.33945.79646.25146.44947.625 63.45263.16262.07861.9260.93261.21461.67162.12662.33263.5ORFS螺纹14.25214.03113.33513.22112.57312.75113.08113.37113.5214.288 17.42717.18816.39616.27415.53515.74816.10416.43116.58917.463 20.59920.36119.56819.44418.70718.92319.27919.60619.76620.638 25.35725.09524.17824.03623.19523.44423.82524.22124.40725.4 30.11929.8328.74528.59827.627.86428.32128.78828.97930.163 36.46736.17735.09334.94333.94734.21434.67135.13835.33136.513 42.81742.52741.44341.2940.29740.56441.02141.48841.68642.863 50.75450.46549.3849.22548.23548.51448.97149.42649.62750.8SAE螺纹15.83915.61814.92314.80314.16114.35114.68114.95815.1115.875 26.94726.68325.74325.60824.7424.96825.37525.78325.96126.987其余美制螺纹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螺纹代号基面上的直径螺纹长度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″×1421.22319.77218.32113.58.028Z3/4″×1426.56825.11723.666148.611Z1″×11.533.22831.46129.69417.510.160 Z1.1/4″×11.541.98540.21838.4511810.688Z1.1/2″×11.548.05446.28744.52018.510.688 Z2″×11.560.09258.32556.5581911.074公制螺纹基本尺寸及公差(牙形角60o)M基本直径螺纹代号大径中径小径M10X1109.3508.917 M12X11211.35010.917 M14X11413.35012.917 M12X1.251211.18810.647 M14X1.251413.18812.647 M12X1.51211.02610.376 M14X1.51413.02612.376 M16X1.51615.02614.376 M18X1.51817.02616.373 M20X1.52019.02618.376 M22X1.52221.02620.376 M24X1.52423.02622.376 M26X1.52625.02624.376 M27X1.52726.02625.376 M30X1.53029.02628.376 M33X1.53332.02631.376 M36X1.53635.02634.376 M39X1.53938.02637.376 M42X1.54241.02640.376 M27X22725.70124.835 M30X23028.70127.835 M33X23331.70130.835 M36X23634.70133.835 M39X23937.70136.835 M42X24240.70139.835 M45X24543.70142.835 M52X25250.70149.835 M60X26058.70157.835 M64X26462.70161.835 M72X27270.70169.835内螺纹外螺纹公差等级公差等级6H7H6g中径公差小径公差中径公差小径公差中径公差大径公差+0.150+0.236+0.190+0.300-0.026-0.026 0000-0.138-0.206 +0.160+0.236+0.200+0.300-0.026-0.026 0000-0.144-0.206 +0.160+0.236+0.200+0.300-0.026-0.026 0000-0.144-0.206 +0.180+0.265+0.224+0.335-0.028-0.028 0000-0.160-0.240 +0.180+0.265+0.224+0.335-0.028-0.028 0000-0.160-0.240 +0.190+0.300+0.236+0.375-0.032-0.032 0000-0.172-0.268 +0.190+0.300+0.236+0.375-0.032-0.032 0000-0.172-0.268 +0.190+0.300+0.236+0.375-0.032-0.032 0000-0.172-0.268 +0.190+0.300+0.236+0.375-0.032-0.032 0000-0.172-0.268 +0.190+0.300+0.236+0.375-0.032-0.032 0000-0.172-0.268 +0.190+0.300+0.236+0.375-0.032-0.032 0000-0.172-0.268 +0.200+0.300+0.250+0.375-0.032-0.032 0000-0.182-0.268 +0.200+0.300+0.250+0.375-0.032-0.032 0000-0.182-0.268 +0.200+0.300+0.250+0.375-0.032-0.032 0000-0.182-0.268 +0.200+0.300+0.250+0.375-0.032-0.032 0000-0.182-0.268 +0.200+0.300+0.250+0.375-0.032-0.032 0000-0.182-0.268 +0.200+0.300+0.250+0.375-0.032-0.032 0000-0.182-0.268 +0.200+0.300+0.250+0.375-0.032-0.032 0000-0.182-0.268 +0.200+0.300+0.250+0.375-0.032-0.032 0000-0.182-0.268 +0.224+0.375+0.280+0.475-0.038-0.038 0000-0.208-0.318 +0.224+0.375+0.280+0.475-0.038-0.038 0000-0.208-0.318 +0.224+0.375+0.280+0.475-0.038-0.038 0000-0.208-0.318 +0.224+0.375+0.280+0.475-0.038-0.038 0000-0.208-0.318 +0.224+0.375+0.280+0.475-0.038-0.038 0000-0.208-0.318 +0.224+0.375+0.280+0.475-0.038-0.038 0000-0.208-0.318 +0.224+0.375+0.280+0.475-0.038-0.038 0000-0.208-0.318 +0.236+0.375+0.300+0.475-0.038-0.038 0000-0.218-0.318 +0.236+0.375+0.300+0.475-0.038-0.038 0000-0.218-0.318 +0.236+0.375+0.300+0.475-0.038-0.038 0000-0.218-0.318 +0.236+0.375+0.300+0.475-0.038-0.038 0000-0.218-0.31855°圆锥管螺纹基本尺寸比较表最新下载 -汇兴达55°圆锥管螺纹基本尺寸比较表最新下载 -汇兴达55°圆锥管螺纹(BSPT)螺纹基本尺寸大径螺距每英寸中小径径外mm牙型高度代号R 1 / 1 6 R 1 / 8R 1 / 4R 3 / 8mm英寸d=D1/17.76"231/89.7"281/413."1573/816."662mmp0.9070.9071.3371.337牙数tpi28281919螺d2H1纹=Dd236.7.15420.581618.9.150.581476611.12.40.8563014514.15.90.8568065R11/220.1.819.14/ "955147932R33/426.1.8 25.14/ "441142794R33. 2.331.11"091124977R112.340.41.11/40911910431/ "4R112.346.47.11/20911803324/ "2R 59. 2.3 58.22"09116141351 8. 6 1.1623 12 4. 1 1.1621 73 0. 2 1.4799 13 8. 9 1.4795 24 4. 8 1.4794 55 6.6 1.4795 6R275.2.373.2111/21840970517 2. 21.479/"2R87. 2.33"88411309R1132.34".0311409R1382.35".4311509R1632.36".831160092684.86.9 1.47940526111110..55 1.479172131365..95 1.4794172161620..35 1.4798172聊城市鑫茂祥管业有限企业专业经营钢管规格: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米及各样规格的无缝方管、异型无缝钢管等.常备钢管种类有:结构用无缝钢管、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、化肥设施用无缝钢管、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,精细无缝钢管、光明无缝钢管、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。
螺纹中径公差等级大全对照表
对于一般紧固件及管接头等通用件有广泛应用。
注意,以上表格中的数值仅供参考,实际应用中可能因具体使用环境和技术需求而有所不同。在实际操作时,建议参考相关行业标准和规范进行准确测量和计算。
+-5.76 ~ +-35.5(公称直径< Φ1.6mm为±1.28~±2.4μm)
中等精度,广泛用于各种机械零件制造。
IT6
+-2.4 - +-14.8(根据需要加浮动符号“~”)
对部分需要可调整尺寸精度的部件适用的中等偏低的公差等级
IT5(基孔制)(Z35钢标注在位置E/C),≤D4 ≥T3级管螺纹:(孔)、六角(薄型); FJG垫圈、LH内六角圆柱头螺钉等材料也用此标准
螺纹中径公差等级大全对照表
公差等级
中径公差(μm)
适用范围
IT01
±4.8 - ±76.4
高精度、高稳定性,适用于精密机械部件和高端产品制造
IT00
±3.2 - ±57.9
次高等级,适用于一般精度要求的场合
IT9
+-1.6 - +-35.5
低精度要求,适用于普通连接件或非关键部位
IT8~IT7(从高到)
新_旧普通螺纹国标公差对照表
6H 比 2 级大 25%~50%,5H
P≤0.8 时近似相 等
6H,由于 TD2 不得 大于 0.25P 所以
内
2级
时用 4H,P=0.25 用 5H
(都是零)
与 2 级近似相等 4H 比 2 级小 11% 5H 比 2 级大 12%
P>0.8 时 6H 比 2 级大 20~30%
P≤0.25 时大于 5H 的公差不列出, P<0.5 时 6H 的公差
新、旧普通螺纹国标公差对照表
GB197-63 新国标公差带 极限偏差对比 中径公差对比 精度等级
顶径公差对比
备注
P≤0.8 时 5H 比 1
1级
4H5H
下偏差重合 (都是零)
4H 比 1 级大 25~55%
级约小 20%, P>0.8 时相差±
10% 尽可能优先选用
6H 或 5H6H p=0.2 下偏差重合
7h6h
上偏差重合
近似相等,P 小 时稍小,P 大时 稍大,相差± 10%个别达到
20% 6h 比 3 级小 35% 7h 比 3 级小 20%
8h 比 3 级大 7~20%,6h 与 3
级差±13%
过渡期用 8h,一般 应优先选 6g6h,由
于 Td2 不得大于 Td,所以 P≤0.3 时, 大于 6h 的公差不列
时,4h 稍小 P 大时,4h 稍大, 相差 10%个别达
4h 比 1 级小 30~40%
螺
2级
20%
近似相等,P 小
上偏差重合 时,6h6g 稍小
6h
(都是零) P 大时,6g 稍大,
相差 10%个别达
近似相等
优先选用 6g
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螺纹代号基本直径内螺纹外螺纹大径中径小径中径公差小径公差A级B级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螺纹代号基面上的直径基准长度有效螺纹长度圆锥内螺纹基面轴向位移偏差(±mm)大径中径小径基本最大最小基本最大最小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 3.5 R3.1/2”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)螺纹代号外螺纹内螺纹公差等级公差等级2A2B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螺纹代号基面上的直径螺纹长度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″×11.533.22831.46129.69417.510.160 Z1.1/4″×11.541.98540.21838.4511810.688 Z1.1/2″×11.548.05446.28744.52018.510.688 Z2″×11.560.09258.32556.5581911.074公制螺纹基本尺寸及公差(牙形角60º) M螺纹代号基本直径内螺纹外螺纹大径中径小径公差等级公差等级6H7H6g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+0.150+0.236+0.190+0.300-0.026-0.138-0.026-0.206M12X11211.35010.917+0.160+0.236+0.200+0.300-0.026-0.144-0.026-0.206M14X11413.35012.917+0.160+0.236+0.200+0.300-0.026-0.144-0.026-0.206M12X1.251211.18810.647+0.180+0.265+0.224+0.335-0.028-0.160-0.028-0.240M14X1.251413.18812.647+0.180+0.265+0.224+0.335-0.028-0.160-0.028-0.240M12X1.51211.02610.376+0.190+0.300+0.236+0.375-0.032-0.172-0.032-0.268M14X1.51413.02612.376+0.190+0.300+0.236+0.375-0.032-0.172-0.032-0.268M16X1.51615.02614.376+0.190+0.300+0.236+0.375-0.032-0.172-0.032-0.268M18X1.51817.02616.373+0.190+0.300+0.236+0.375-0.032-0.172-0.032-0.268M20X1.52019.02618.376+0.190+0.300+0.236+0.375-0.032-0.172-0.032-0.268M22X1.52221.02620.376+0.190+0.300+0.236+0.375-0.032-0.172-0.032-0.268M24X1.52423.02622.376+0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M26X1.52625.02624.376+0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M27X1.52726.02625.376+0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M30X1.53029.02628.376+0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M33X1.53332.02631.376+0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M36X1.53635.02634.376+0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M39X1.53938.02637.376+0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M42X1.54241.02640.376+0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M27X22725.70124.835+0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M30X23028.70127.835+0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M33X23331.70130.835+0.224+0.375+0.280+0.475-0.038-0.0380000-0.208-0.318M36X23634.70133.835+0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M39X23937.70136.835+0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M42X24240.70139.835+0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M45X24543.70142.835+0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M52X25250.70149.835+0.236+0.375+0.300+0.475-0.038-0.218-0.038-0.318M60X26058.70157.835+0.236+0.375+0.300+0.475-0.038-0.218-0.038-0.318M64X26462.70161.835+0.236+0.375+0.300+0.475-0.038-0.218-0.038-0.318M72X27270.70169.835+0.236+0.375+0.300+0.475-0.038-0.218-0.038-0.318。