GBT9145-1988-商品紧固件的中等精度普通螺纹极限尺寸.pdf

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1、中华人民共和国国家标准UDC621.882082商品紧固件的中等精度GB9145一88普通螺纹极限尺寸Generalpurposescrewthread，一Limitsofsizesforcommercialboltandnutthreads-Mediumquality本标准等效采用国际标准ISO965/2-1980IXISO米制普通螺纹-一公差—普通螺栓和螺母的极限尺寸—中等精度》。1主题内容与适用范围本标准规定公称直径1至39mm商品紧固件的中等精度、中等旋合长度粗牙及细牙普通螺纹极限尺寸。本标准适用于查取商品紧固件的中等精度、中等旋合长度普通螺纹极限尺寸。2引用标准GB196普通螺纹基

2、本尺寸GB197普通螺纹公差与配合3螺纹公差带商品紧固件的中等精度、中等旋合长度螺纹公差带为:内螺纹:5H(簇M1.4)6H(>M1.6)外螺纹:6h(毛M1.4)6g()M1.6)4涂镀螺纹对需要涂镀薄保护层的螺纹，如无特殊说明，本标准的极限尺寸用于镀前，镀后螺纹实际轮廓上的任何点均不应超越公差带按H,h位置所确定的最大实体牙型。本标准规定的极限尺寸对镀前采用其他公差带的螺纹不适用。5极限尺寸内、外螺纹的极限尺寸见表1至表40国家标准局1988一04一25批准1989一02一01实施GB9145一88表中等精度6H的粗牙内螺纹极限尺寸11，nl旋长中径小径一一螺纹规格卜耳最大最小最大最小M

3、1.0.60000.8940.8380.7850.729MI.10.61000.9940.9380.829M1.2n62001.0941.038:::0.929M10.7400.2651.205.142075M10.8600_4581.373.321221MI0.吕:.:800.6581.573.521421M22.0001.8301.7401.6791.567M2.22.2002.0031.9081.8381.713M2.5:.:2。5口n2.3032.2082.1382.013M34.53.00027752.6752.5992.459M3-553.5003.1103.0102.850M4

4、64.000:::3.5453.4223.242M4.56.74.5004.1314.0133.8783.688M5:.:7.55.0004.6054.4804.3344.134M6g6.0005.5005.3505.1534.917M77.0006.5006.3506.1535.917M88.0007.3487.1886.9126.647M1010.0009.2069.0268.676日.376任M1212.00011.06310.86310.44110.106别M1414.00012.91312.70112.21011.8358别M1616.00014.91314.70114.21013

5、.835--10加M1818.00016.60016.37615.74415.2941030M2020.00018.60018.37617.74417.2941030M2222.00020.60020.37619.74419.294M2424.00022.31622.05121.25220.752M2727.00025.31625.05124.25223.752M3030.0002s.00727.72726.77126.211M3333.00031.00730.72729.77129.211M3636.00033.70233.40232.27031.670I3939.00036.70236.

6、40235.27034.670赞对小于或等于M1.准的螺纹，其公差带为SHGB9145一88中等精度69的粗牙外螺纹极限尺寸mm表2旋合长度大径径牙底最小螺纹规格>(最大最小最大最小圆弧平径MIJ0.61.0000.9330.8380-7850.031M1.10.6:’:1.1001-0330.9380.8850.031M1.20.61.2001.1331.0380.9850.031M1.10.71.400325205.1490.038M1.60.81.581.4963542910-044M1.80.8::1.781.696554.4910.044M231.9811.886】721】.654

7、0.050M2.23.82.1802.0801.888].8170.056M25382.4802.3R02.1882.1170.056M34.52.9802.8742.5800.063M3-53.4793.354.:;;3.0040.075M刁3.9783.8383.5233.礴330.088M4.52.26.74.4784.3383.9913.9010.094M52.57.54.9764.8264.4564