螺距表，螺距紧固件螺纹直径与螺距对照表螺纹规M3M4M5M6M8M10M12M14M16M18M20M22M24粗牙螺距0.50.70.81.01.251.51.752.02.02.52.52.53.0细牙螺距----1.01.0-1.251.25-1.51.51.51.51.5-2.02.02.0螺纹规M27M30M33M36M39M42M45M48M52M56M60M64粗牙螺距3.03.53.54.04.04.54.55.05.05.55.56.0细牙螺距2.02.02.03.03.03.03.03.04.04.04.04.0螺纹规M3M4M5M6M8M10M12M14M16M18M20M22M24M27M30M33M36M39M42M45M48M52M56M60M64粗牙螺距0.50.70.81.01.251.51.752.02.02.52.52.53.03.03.53.54.04.04.54.55.05.05.55.56.0细牙螺距----1.01.0-1.251.5-1.251.51.51.52.0-1.52.02.02.02.02.03.03.03.03.03.04.04.04.04.0螺栓、螺钉、螺柱公称长度表6810121620253035404550(55)60(65)7075808590(95)100105110115120125130140150160170180190200220240260280300注：尽量不采用括号内尺寸螺栓、螺钉、螺柱螺纹的公称长度螺纹规M3M4M5M6M8M10M12M14M16M18M20M22M24M27M30M33M36M39M42M45M48M52M56M60M64粗牙螺距1214161822263034384246505460667278849096102----注：公称长度1螺纹长度b,则：①1≤125b=2d+6②1>125—200b=2d+2③1>200b=2d+5公、英制对照表、紧固件常用尺寸规格规格牙距规格称呼径牙数粗牙细牙极细牙粗牙细牙韦氏牙M30.50.354#2.94048M40.70.56#3.53240M50.80.58#4.23236M61.00.7510#4.82432M71.00.7512#5.52428M81.251.00.751/46.35202820M101.51.251.05/167.94182418M121.751.51.253/89.53162416M142.01.51.07/1611.11142014M162.01.51.01/212.7132012M182.52.01.59/1614.29121812M202.52.01.55/815.86111811M222.52.01.53/419.05101610M243.02.01.57/822.239149M273.02.01.5125.408128M303.53.02.0规格英寸毫米规格英寸毫米No.00000.02100.53341/40.25006.3500No.0000.03400.86365/160.31257.9375No.000.04701.19383/80.37509.5250No.00.06001.52407/160.437511.1125No.10.07301.85421/20.500012.7000No.20.08602.18449/160.562514.2875No.30.09902.51465/80.625015.8750No.40.11202.84483/40.750019.0500No.50.12503.17507/80.87522.2250No.60.13803.505211.000025.4000No.70.15103.83541-1/81.125028.5750No.80.16404.15661-1/41.250031.7500No.90.17704.49581-3/81.375034.9250No.100.19004.82601-1/21.500038.1000No.120.21605.48641-5/81.625041.2750No.140.24206.14681-3/41.750044.4500No.160.26806.80721-7/81.875047.6250No.180.29407.467622.000050.8000No.200.32008.1280No.240.37209.4488公称直径与螺距系列表GB193-63公称直径d(毫米)螺距l(毫米)公称直径d(毫米)螺距l(毫米)第一系列第二系列第三系列粗牙细牙第一系列第二系列第三系列粗牙细牙(28)21.5110.250.2303.5(3)21.510.751.10.250.2(32)21.51.20.250.2333.5(3)21.510.751.40.30.235(1.5)1.60.350.2364321.511.80.350.2(38)1.520.40.25394321.512.20.450.2540(3)(2)1.52.50.450.35424.5(4)321.5130.50.35454.5(4)321.513.5(0.6)0.35485(4)321.5140.70.550(3)(2)1.54.5(0.75)0.5525(4)321.5150.80.555(4)(3)21.5(5.5)0.5565.54321.51610.750.558(4)(3)21.5710.750.560(5.5)4321.5181.2510.750.562(4)(3)21.59(1.25)10.750.56464321.51101.51.2510.750.565(4)(3)1.511(1.5)10.750.5686431.51121.751.51.2510.750.5注：1、选择螺纹的公称直径时，优先选用第一系列，其次第二系列，第三系列尽可能不用。2、括号内的公称直径和螺距以及粗线右边螺距，尽可能不采用。3、M14×1.25螺纹仅用于火花塞；M35×1.5螺纹仅用于滚珠抽承紧锁螺母。4、国家标准中还列有0.25~0.8和70~600毫米的公称直径系列，因一般应用不多故从略。1421.51.2510.750.5151.5(1)1621.510.750.5171.5(1)182.52210.750.5202.52210.750.5222.5310.750.524321.510.75251.5(1)(26)1.52731.510.75螺丝的图纸上只知道是M6，那螺距什么的怎么知道公称直径螺距(粗牙)平面切削牙朱咀挤压牙攻牙后内孔M1.00.250.75±0.020.88±0.020.78M1.10.250.85±0.020.98±0.020.88M1.20.250.95±0.021.08±0.020.98M1.40.31.1±0.021.25±0.021.14M1.60.351.25±0.021.43±0...
