小五金知识手册管理.doc

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1、小五金知识手册管理1．螺钉定义：由头部和螺杆两部份构成的一类紧固件．本手册中包括的螺钉主要有机械螺钉、自攻螺钉、塑料螺钉和浮动螺钉等．机械螺钉：由头部和螺杆两部份构成的一类金属紧固件﹒主要用于一个带有内螺纹孔的零件与带有通孔的零件之间的紧固联接，不需要螺母配合；也用于带有通孔的零件之间的紧固联接，但要与螺母配合﹒属可拆卸连接．自攻螺钉：由头部和螺杆两部份构成的一类金属紧固件，但螺杆上的螺纹为专用的自攻螺钉用螺纹﹒用于紧固联接两个薄的金属构件，使之成为一体，构件上需事先制出小孔﹒这种螺钉具有较高的硬度，可直接旋入构件的孔中，使构件孔中形成相应的内螺纹﹒1.1螺纹标志及尺寸

2、(除非特别指明，适用于所有的螺钉、螺母和螺柱)　　螺纹分为外螺纹和内螺纹两种，一般螺钉为外螺纹形式，螺母或螺柱为内螺纹形式，常用的螺纹如图标．H：原始三角形高度　　P：螺距　　　D：内螺纹公称直径　　d：外螺纹公称直径　H1：螺纹牙高D2：内螺纹中径　D1：内螺纹小径　d2：外螺纹中径　d1：外螺纹小径　n为每英寸牙数．1.1.1米制细牙螺纹H=0.Pd2=d-0.PD=dH1=0.Pd1=d-1.PD2=d2D1=d1单位mm螺纹标志PH1d(D)d2(D2)d1(D1)M1×0.20.20.1081.0000.8700.783M1.1×0.20.20.1081.10

3、00.9700.883M1.2×0.20.20.1081.2001.0700.983M1.4×0.20.20.1081.4001.2701.183M1.6×0.20.20.1081.6001.4701.383M1.8×0.20.20.1081.8001.6701.583M2×0.250.250.1352.0001.8381.729M2.2×0.250.250.1352.2002.0381.929M2.5×0.350.350.1892.5002.2732.121M3×0.350.350.1893.0002.7732.621M3.5×0.350.350.1893.5003.

4、2733.121M4×0.50.50.2714.0003.6753.459M4.5×0.50.50.2714.5004.1753.959M5×0.50.50.2715.0004.6754.459M5.5×0.50.50.2715.0005.1754.959M6×0.750.750.4066.0005.5135.188M81,0.75M101.25,1M121.5,1.252米制粗牙螺纹H=0.Pd2=d-0.PD=dH1=0.Pd1=d-1.PD2=d2D1=d1单位mm螺纹标志PH1d(D)d2(D2)d1(D1)M10.250.1351.0000.8380.729M

5、1.10.250.1351.1000.9380.829M1.20.250.1351.2001.0380.929M1.40.30.1621.4001.2051.075M1.60.350.1891.6001.3731.221M1.80.350.1891.8001.5731.421M20.40.2172.0001.7401.567M2.20.450.2442.2001.9081.713M2.50.450.2442.5002.2082.013M30.50.2713.0002.6752.459M3.50.60.3253.5003.1102.850M40.70.3794.0003.

6、5453.242M4.50.750.4064.5004.0133.688M50.80.4335.0004.4804.134M610.5416.0005.3504.917M81.256.65M101.58.38M121.7510.1116213.84202.517.291.1.3英制细牙螺纹P=25.4÷nH=0.Pd=(d)×25.4D=d　H1=0.Pd2=(d-0./n)×25.4D2=d2d1=(d-1./n)×25.4　D1=d1单位mm螺纹标志(Reference)N牙数P螺距H1d(D)外径d2(D2)d1(D1)No.0-80UNF0.0600-80UNF

7、800.31750.1721.5241.3181.181No.1-72UNF0.0730-72UNF720.35280.1911.8541.6261.473No.2-64UNF0.0860-64UNF640.39690.2152.1841.9281.755No.3-56UNF0.0990-56UNF560.45360.2462.5152.2202.024No.4-48UNF0.1120-48UNF480.52920.2862.8452.5022.271No.5-44UNF0.1250-44UNF440.57730.3123.1752.79