螺纹公差等级对照表

螺纹精度等级6h的公差范围为-0.150-0.0mm。螺纹精度是衡量螺纹质量的综合指标，由螺纹公差带和螺纹长度组成。6h等级对应的螺纹中径为5.35。公差等级是指决定尺寸精度的等级。按照国家标准，一共有20个级别。从IT01sitO、itl、it2到itl8,数值越大，公差等级（加工精度）越低，允许尺寸范围（公差值）越大，加工难度越小。扩展数据：公差等级的相关规定:1在满足零件要求的前提下,尽量选择较低的公差等级。精度要求应与生产可能性相_致，即采用合理的加工工艺、装配工艺和现有设备。2选择公差等级时，不仅要满足设计要求，还要考虑技术可行性和经济性。选择最佳加工精度是一个非常复杂的技术和经济问题。它不仅要考虑加工成本，还要考虑加工精度提高后的装配成本，以及精度对性能和经济指标（可靠性、寿命、油耗等）的影响。3、在机械制造中，公差水平是为了保证机器的精度和零件的互换性，保证制造机器的经济性。也就是说”只要精度较低,机器的功能和精度都是可以保证的”对零件不需要要求太高的精度,这样会增加制造成本。内螺纹公差等级外螺纹公差等级外螺纹公差6H7H6H6G小直径公差小直径公差小直径公差M10*l109.358.9170,+0.1500,+0.2360,+0.19000,+0.300-0.026,-0.13&0.026,0.206M12M12*l12111111.351010.9170,+0.1600,+0.2360000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.64700,+0.1800,+0.265000,+0.224000,+0.335-0.028,-0.160-0.028,-0.1600.028,-0.2400年240M141.251414131313.18812.6470英寸12.6470,+0.18000,+0.26500,+0.2650,+0.2240,+0.2240,+0.22400,0.330.028,。240、240、240、240、2、2、12、11.026.10.376的0,+0.1900,+0.30000,+0.2360,+0.375-0.032,-0.172-0.032,-,-0.172-0.032,-0.268M14441.514141413.02612.3760的0,+0.1900,+0.30000,+0.0000.00000,+0.236000.23600,+0.375-0.032,-0.172-0.032,-0.172-0.032,-0.2688M1611111111111161616161616161600914.3760,+0.19000,+0.3000000.3000,+0.236000,+0.375-0.032z-0.172-0.032,—0.268M181.1M18的1.11111111118181818181817.02616.37600000000000000000000000000000000000000000000000000000000000000000000000000000000000000.28201002618660000000000000000000000000000000000000000000000000000000000000000000000000000000060,+0.1900,+0.3000,+0.236000,+0.2360,+0.375-0.032,-0.172,0.032,-0.268M24.1,1414141423.02622.3760,+0.200000,+0.200000z+0.3000000000000000,+0.250000f+0.375-0.032,-0.182-0.032,-0.182-0.032,-0.268M26M26M260001.52626262525.02624.37600000000000000000000000000000000000000000000000000000000000000000000000000000000000000.268M27*1.52726.02625.3760,+0.2000,+03000,+0.2500,+0.375-0.032,-0.182-0.032,-0.268M300.268M300.268M300.268M300.268M30,1.530303029.02628.3760,+0.2000,+0.3000,+0.250000f+0.375-0.032,+0.182-0.032,+0.182-0.032,-0.268M3331.31.37600,+0.200000z+0.300000000000000000000000000000000000000000000000000000000000000000000032f+0.182000.000.0,+0.375-0.032z+0.182,0.0z0.0f+0.0z+0.0z+0.0z+0.0,+0.0#+0.3000.+0.2500z+0.375-0.032r-0.375-0.032,-0.182-0.032z,-0.268M39的9.393938.02637.3760,+0.2000,+0.3000,+0.25000,+0.375-0.032,-0.182-0.0.182-0.182-0.182-0.182-0.182-0.182-0.182-0.032,-0.268M42,1.542424242424242424242424241.02640.0240.37600,+0.2000000.3000,0.3000000.250000000000000000000000.032,-0.182-0.032,-0.268M28M272727270,+0.22400,+0.37500.3750,+0.280000.000.4750.038,-0.208的0.038,-0.208的0.038,-0.208的0,-0318的0.318303030303028282828.70127.70127.8350.2240,+0.3750,+0.2800,+0.475-0.038的,-0.208-0.038,-0.208-0.038,-0.318M33M3333*23331.31.70130.83500,+0.2240,+0.3750,+0.0.2800.2800,+0.47500.0.0.0.0.0.4750.0.0.0.0.5-0.038r0.208-0.038r0.318Of31.31M36*23634.70133.8350,+0.2240,+03750r+0.2800,+0.475-0.038f-0.208-0.038,-0.208-0.038,-0.318的M39,393939373737370,+0.2240,+0.3750,+0.3750,+0.3750,+0.2800,+0.2800,+0.475的0.0380.475-0.038,-0.208-0.038,-0.208-0.038,-0.208-0.038,-0.208-0.038M42的0318M42,42424242424242424242424242424242424242424242424242420.+0.475度-