《小五金知识手册管理》由会员分享，可在线阅读，更多相关《小五金知识手册管理（23页珍藏版）》请在金锄头文库上搜索。
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(除非特别指明，适用于所有的螺钉、螺
2、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 =0.866025Pd2=d-0.649519PD=dH1=0.541266Pd1=d-1.082532PD2=d2D1=d1单位mm螺纹标志PH1d(D)d2(D2)d1(D1)M1 0.20.20.1081.0000.8700.783M1.10.20.20.1081.1000.9700.883M1.20.20
3、.20.1081.2001.0700.983M1.40.20.20.1081.4001.2701.183M1.60.20.20.1081.6001.4701.383M1.80.20.20.1081.8001.6701.583M2 0.250.250.1352.0001.8381.729M2.20.250.250.1352.2002.0381.929M2.50.350.350.1892.5002.2732.121M3 0.350.350.1893.0002.7732.621M3.50.350.350.1893.5003.2733.121M4 0.50.50.2714.0003.6753.459M
4、4.50.50.50.2714.5004.1753.959M5 0.50.50.2715.0004.6754.459M5.50.50.50.2715.0005.1754.959M6 0.750.750.4066.0005.5135.188M81,0.75M101.25,1M121.5,1.252米制粗牙螺纹H =0.866025Pd2=d-0.649519PD=dH1=0.541266Pd1=d-1.082532PD2=d2D1=d1单位mm螺纹标志PH1d(D)d2(D2)d1(D1)M10.250.1351.0000.8380.729M1.10.250.1351.1000.9380.829
5、M1.20.250.1351.2001.0380.929M1.40.30.1621.4001.2051.075M1.60.350.1891.6001.3731.221M1.80.350.1891.8001.5731.421M20.40.2172.0001.7401.567M2.20.450.2442.2001.9081.713M2.50.450.2442.5002.2082.013M30.50.2713.0002.6752.459M3.50.60.3253.5003.1102.850M40.70.3794.0003.5453.242M4.50.750.4064.5004.0133.688M50
6、.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=25.4nH =0.866025Pd=(d)25.4 D=d H1=0.541266P d2=(d-0.649519/n)25.4 D2=d2d1=(d-1.082532/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. 0-80 UNF0.0600-80 UNF800.31750.1721.5241.318
7、1.181No. 1-72 UNF0.0730-72 UNF720.35280.1911.8541.6261.473No. 2-64 UNF0.0860-64 UNF640.39690.2152.1841.9281.755No. 3-56 UNF0.0990-56 UNF560.45360.2462.5152.2202.024No. 4-48 UNF0.1120-48 UNF480.52920.2862.8452.5022.271No. 5-44 UNF0.1250-44 UNF440.57730.3123.1752.7992.550No. 6-40 UNF0.1380-40 UNF400.6
8、3500.3443.5053.0942.817No. 8-36 UNF0.1640-36 UNF360.70560.3824.1663.7083.401No. 10-32 UNF0.1900-32 UNF320.79380.4304.8264.3104.967No. 12-28 UNF0.2160-28 UNF280.90710.4915.4864.8974.5031.1.4英制粗牙螺纹P=25.4nH =0.866025Pd=(d)25.4 D=d H1=0.541266P d2=(d-0.649519/n)25.4 D2=d2d1=(d-1.082532/n)25.4D1=d1单位mm螺纹
9、标志(Reference)nPH1d(D)d2(D2)d1(D1)No. 1-64 UNC0.0730-64 UNC640.39690.2151.8541.5981.425No. 2-56 UNC0.0860-56 UNC560.45360.2462.1841.8901.694No. 3-48 UNC0.0990-48 UNC480.52920.2862.5152.1721.941No. 4-40 UNC0.1120-40 UNC400.63500.3442.8452.4332.156No. 5-40 UNC0.1250-40 UNC400.63500.3443.1752.7642.487No
10、. 6-32 UNC0.1380-32 UNC320.79380.4303.5052.9902.647No. 8-32 UNC0.1640-32 UNC320.79380.4304.1663.6503.307No. 10-24 UNC0.1900-24 UNC241.05830.5734.8264.1383.680No. 12-24 UNC0.2160-24 UNC241.05830.5735.4864.7984.3411/4-204.725/16-186.133/8-167.491/2-129.995/8-1112.923/4-1015.87/818.611-821.341.2通孔孔径螺钉连
11、接零件上预制之通孔如图标：通孔孔径之尺寸如下表(单位mm)：螺钉公称直径通孔直径(d)mm1级2级3级4级1.01.11.21.31.21.31.41.51.41.51.61.81.61.71.82.01.71.82.02.11.82.02.12.22.02.22.42.62.22.42.62.82.32.52.72.92.52.72.93.12.62.833.23.03.23.43.63.53.73.94.24.04.34.54.85.54.54.85.05.36.05.05.35.55.86.566.46.677.81.3攻螺纹孔孔径与螺钉相配的螺纹攻丝孔孔径取决于外内螺纹结合比之大小螺纹结合比(%)=(螺钉公称直径-攻丝孔直径)(2螺纹结合高度)100(%)1.3.1米制细牙螺纹(单位mm)螺纹标志公称直径螺纹结合比(%)1009590858075706560M11.0000.780.790.810.820.830.840.850.860.87M1.11.1000.880.890.910.920.930.940.950.960.97M1.21.2000.980.991.011.021.031.041.051.061.07M1.41.4001
