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1、小五金工程評估手冊 第 57頁 共 57 頁 目录1. 螺钉 61.1螺纹标志及尺寸 61.1.1米制细牙螺纹 71.1.2米制粗牙螺纹 81.1.3英制细牙螺纹 81.1.4英制粗牙螺纹 91.2通孔孔径 101.3攻螺纹孔孔径 111.3.1米制细牙螺纹 111.3.2米制粗牙螺纹 111.3.3英制细牙螺纹 121.3.4英制粗牙螺纹 131.3.5板材上孔与板边间距 131.4 配合尺寸 131.5 机械性能 131.6 钢板厚度 141.7 特殊螺钉 151.7.1 自攻螺钉 151.7.1.1 硬化层深度 151.7.1.2 硬度 161.7.1.3 尺寸 161.7.1.4 工作
2、扭力 171.7.1.5 结合比与预冲孔呎寸关系 181.7.1.6 钢板孔径及抽牙高 191.7.2 塑料螺钉 201.7.2.1 螺纹形状 201.7.2.2 硬度 211.7.2.3 螺纹呎寸 211.7.3 浮动螺钉 211.7.3.1 浮动螺钉形状 211.7.3.2 基本要求 211.8 螺钉验证方法 22资料： 23A 螺钉常见穴型简介 23B 常用板材硬度 23C 电镀层 232. 螺母 242.1制造材料 242.1.1材料牌号 242.1.2材质化学成份 242.1.3 机械性能 242.1.4 螺母材料的选取 242.2尺寸及公差 252.2.1型号为“S. SS. CL
3、S以及CLSS”的自铆螺母尺寸 252.2.2型号为SP, 专用于不锈钢冲压板件上的自铆螺母尺寸 282.2.3型号为H, HN, HNL之易削钢制自锁和防锁螺母的尺寸 302.2.4型号为F的自铆螺母尺寸 302.2.5尺寸公差 322.3 压铆要求 322.4 配合呎寸 352.5 螺母验证方法 353. 螺柱 363.1制造螺柱材料 363.1.1材料牌号 363.1.2化学成份 363.1.3 机械性能 363.1.4 螺柱材料的选取 373.2尺寸 373.2.1型号为“SO. SON. SOA. SOS. ”的通孔螺柱 373.2.1.1一般尺寸 383.2.1.2螺纹规格和螺柱长
4、度 393.2.2 型号为“BSO.BSON. BSOA.BSOS. ”的盲孔螺柱 403.2.2.1一般尺寸 403.2.2.2螺纹规格和螺柱长度 413.3 公差 433.4 压铆要求 433.5 螺柱验证方法 444. 支柱 454.1型号为“SO.SON. SOA.SOS”的通孔支柱 454.1.1材料牌号 454.1.2材质化学成份 454.1.3机械性能 454.1.4 螺柱材料的选取 464.1.5一般尺寸 464.1.6支柱规格和支柱长度 474.1.7公差 494.2 其它异型支柱 494.2.1 制造材料 494.2.2尺寸 494.2.3 板材厚度及孔径 514.3 压铆
5、要求 514.4 支柱验证方法 525.拉钉 535.1 拉钉制造材料 545.2 尺寸 545.3 拉钉验证方法 556.弹簧 566.1 弹簧制造材料 566.2弹簧钢丝呎寸 566.2.1制造弹簧用不锈钢钢丝标准直径 566.2.2标准钢丝尺寸偏差 576.3 弹簧自由长度 576.4 弹簧外径D 576.5弹簧的总圈数 576.6 弹簧的方向 576.7弹簧验证方法 571 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
6、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塑料螺钉：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塑料螺钉用螺纹可直接旋入塑料件中，用于把一个带通孔的金属(或非金属)零件与一个塑料件紧固联接在一起浮动螺钉：压铆于冲件预制孔内, 用于经常拆装之冲压件的把手螺钉, 其结构特点是螺钉本体内包含弹性体1.1 螺纹标志及尺寸(除
7、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，常用的螺纹如图示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 =0.866025P d2=d-0.649519P D=dH1=0.541266P d1=d-1.082532P D2=d2 D1=d1单位mm螺纹标志PH1d(D)d2(D2)d1(D1)M1 0.20.20.1081.0000.8700.783M1.10.20.20.10
8、81.1000.9700.883M1.20.20.20.1081.2001.0700.983M1.40.20.20.1081.4001.2701.183M1.60.20.20.1081.6001.4701.383M1.80.20.20.1081.8001.6701.583M2 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 0.5
9、0.50.2714.0003.6753.459M4.50.50.50.2714.5004.1753.959M5 0.50.50.2715.0004.6754.459M5.50.50.50.2715.0005.1754.959M6 0.750.750.4066.0005.5135.1881.1.2米制粗牙螺纹H =0.866025P d2=d-0.649519P D=dH1=0.541266P d1=d-1.082532P D2=d2 D1=d1单位mm螺纹标志PH1d(D)d2(D2)d1(D1)M10.250.1351.0000.8380.729M1.10.250.1351.1000.938
10、0.829M1.20.250.1351.2001.0380.929M1.40.30.1621.4001.2051.075M1.60.350.1891.6001.3731.221M1.80.350.1891.8001.5731.421M20.40.2172.0001.7401.567M2.20.450.2442.2001.9081.713M2.50.450.2442.5002.2082.013M30.50.2713.0002.6752.459M3.50.60.3253.5003.1102.850M40.70.3794.0003.5453.242M4.50.750.4064.5004.0133.6
11、88M50.80.4335.0004.4804.134M610.5416.0005.3504.9171.1.3英制细牙螺纹 P=25.4n H =0.866025P d=(d) 25.4 D=d H1=0.541266P d2=(d-0.649519/n) 25.4 D2=d2 d1=(d-1.082532/n) 25.4 D1=d1单位mm螺纹标志(Reference)nPH1d(D)d2(D2)d1(D1)No. 0-80 UNF0.0600-80 UNF800.31750.1721.5241.3181.181No. 1-72 UNF0.0730-72 UNF720.35280.1911.
12、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 UNF400.63500.3443.5053.0942.817No. 8-36 UNF0.1640-36
13、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=25.4n H =0.866025P d=(d) 25.4 D=d H1=0.541266P d2=(d-0.649519/n) 25.4 D2=d2 d1=(d-1.082532/n) 25.4 D1=d1单位mm螺纹标志(Reference)nPH1d(D)d2(D2)d1(D1)No. 1
14、-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. 6-32 UNC0.1380-32 UNC320.79380.4303.
15、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 UNC241.05830.5735.4864.7984.3411.2通孔孔径螺钉连接零件上预制之通孔如图示：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11.11.21.31.21.31.41.51.41.51.61.81.61.71.821.71.822.11.82.02.1
16、2.222.22.42.62.22.42.62.82.32.52.72.92.52.72.93.12.62.833.233.23.43.63.53.73.94.244.34.54.85.54.54.855.3655.35.55.86.566.46.677.81.3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
17、.11.1000.880.890.910.920.930.940.950.960.97M1.21.2000.980.991.011.021.031.041.051.061.07M1.41.4001.181.191.211.221.231.241.251.261.27M1.61.6001.381.391.411.421.431.441.451.461.47M1.81.8001.581.591.611.621.631.641.651.661.67M22.0001.731.741.761.771.781.801.811.821.84M2.22.2001.931.941.961.971.982.002
18、.012.022.04M2.52.5002.122.142.162.182.202.222.242.252.27M33.0002.622.642.662.682.702.722.742.752.77M3.53.5003.123.143.163.183.203.223.243.253.27M44.0003.463.493.513.543.573.593.623.653.68M4.54.5003.963.994.014.044.074.094.124.154.18M55.0004.464.494.514.544.574.594.624.654.68M5.55.5004.964.995.015.04
19、5.075.095.125.155.18M66.0005.195.235.275.315.355.395.435.475.511.3.2米制粗牙螺纹(单位mm)螺纹标志公称直径1009590858075706560M11.0000.730.740.760.770.780.800.810.820.84M1.11.1000.830.840.860.870.880.900.910.920.94M1.21.2000.930.940.960.970.981.001.011.021.04M1.41.4001.081.091.111.121.141.161.171.191.21M1.61.6001.221.
20、241.261.281.301.321.331.351.37M1.81.8001.421.441.461.481.501.521.531.551.57M22.0001.571.591.611.631.651.681.701.721.74M2.22.2001.711.741.761.791.811.831.861.881.91M2.52.5002.012.042.062.092.112.132.162.182.21M3*0.53.0002.462.492.512.542.572.592.622.652.68M3.53.5002.852.882.922.952.983.013.053.083.11
21、M4*0.74.0003.243.283.323.363.393.433.473.513.55M4.54.5003.693.733.773.813.853.893.933.974.01M5*0.85.0004.134.184.224.264.314.354.394.444.48M66.0004.924.975.035.085.135.195.245.305.351.3.3英制细牙螺纹(单位mm)螺纹标志公称直径1009590858075706560No. 0-80 UNF1.5241.181.201.211.231.251.271.281.301.32No. 1-72 UNF1.8541.47
22、1.491.511.531.551.571.591.611.62No. 2-64 UNF2.1841.751.781.801.821.841.861.881.901.93No. 3-56 UNF2.5152.022.052.072.102.122.152.172.202.22No. 4-48 UNF2.8452.272.302.332.362.392.422.442.472.50No. 5-44 UNF3.1752.552.582.612.642.682.712.742.772.80No. 6-40 UNF3.5052.822.852.892.922.962.993.023.063.09No.
23、 8-36 UNF4.1663.403.443.483.523.553.593.633.673.71No. 10-32 UNF4.8263.974.014.054.104.144.184.224.274.31No. 12-28 UNF5.4864.504.554.604.654.704.754.804.854.901.3.4英制粗牙螺纹(单位mm)螺纹标志公称直径1009590858075706560No. 1-64 UNC1.8541.421.451.471.491.511.531.551.571.60No. 2-56 UNC2.1841.691.721.741.771.791.821.84
24、1.861.89No. 3-48 UNC2.5151.941.972.002.032.062.092.112.142.17No. 4-40 UNC2.8452.162.192.232.262.302.332.362.402.43No. 5-40 UNC3.1752.492.522.562.592.632.662.692.732.76No. 6-32 UNC3.5052.652.692.732.772.822.862.902.952.99No. 8-32 UNC4.1663.313.353.393.443.483.523.563.613.65No. 10-24 UNC4.8263.683.743
25、.793.853.913.974.024.084.14No. 12-24 UNC5.4864.344.404.454.514.574.634.684.744.801.3.5板材上孔与板边间距(对所有螺钉适用)板材上螺纹孔与板边间距如图要求b2t (b为孔与板边的距离，t为板材厚度)1.4 配合尺寸同种规格的螺钉需与同种规格螺纹的螺母或与预攻同规格螺纹孔的钢板配合如对M3的螺钉需与M3的螺母相配合，或者与在钢板上攻出M3的螺纹孔相配合1.5 机械性能(包括材质与热处理)一般用C0.20%的低碳钢制造，拉伸强度要求不小于330MPa；硬度不小于95HV(90HB或52HRB)；屈服强度不小于190MPa；延伸率不小于25%部分螺钉拉力如下表：螺纹标志M1.6M2M2.2M2.5M3M3.5M4M5M6最小拉力(N)4206206801120166022402900469066301.6 钢板厚度(取决于螺钉与内螺纹的结合长度，钢板厚度应大于实
