硬材软材W 1/8 - 402.652.60M3×0.52.63-2.60SM1/8-402.735-2.688W 5/32 - 323.253.20M3.0×0.62.56-2.53SM1/8-442.769-2.722W 3/16 - 243.753.70M3.5×0.63.06-3.03SM9/64-403.128-3.083W 1/4 - 205.105.00M4.0×0.73.49-3.45SM11/64-403.855-3.805W 5/16 - 186.606.50M4.0×0.753.45-3.41SM3/16-324.205-4.155W 3/8 - 168.007.90M4.5×0.753.96-3.92SM3/16-284.143-4.093W 7/16 - 149.409.30M5.0×0.84.43-4.38SM7/32-325.003-4.955W 1/2 - 1210.7010.50M5.0×0.94.36-4.31SM15/64-285.325-5.570W 9/16 - 1212.3012.00M6.0×1.05.30-5.25SM1/4-405.890-5.735W 5/8 - 1113.7013.50M7.0×1.06.30-6.25SM1/4-285.721-5.366W 3/4 - 1016.7016.50M8.0×1.07.28-7.23SM9/32-286.508-6.648W 7/8 - 919.5019.30M8.0×1.257.12-7.07SM11/32-288.092-8.432W1 - 822.4022.00SM3/8-288.880-8.015W 1-1/8 - 725.0024.80SM7/16-2810.466-10.401W 1 - 1/4 - 728.3028.00SM7/16-1610.037-9.967SM1/2-2011.819-11.749SM9/26-2013.400-13.425针车用螺纹螺丝攻牙钻孔径和滚造径对照表
最大最小最大最小最大最小规格精度最大最小最大最小最大最小最大最小规格精度最大最小M1.0×0.20.800.8210.783M1.0×0.250.750.7850.729(螺丝牙外径）硬材软材M1.1×0.20.900.9210.883M1.1×0.250.850.8850.829No.0-80(1.524)1.251.3051.182 # 1 -64G51.761.682.652.6M1.2×0.21.001.0210.983M1.2×0.250.950.9850.929No.1-72(1.854)1.551.6121.474 #2 -56G42.041.963.253.2M1.4×0.21.201.2211.183M1.4×0.31.101.1421.075No.2-64(2.184)1.851.9121.756 # 3-48G42.352.253.753.7M1.6×0.21.401.4211.383M1.6×0.351.251.3211.221No.3-56(2.515)2.12.1972.025 #4 -40G52.642.545.15M1.7×0.21.501.5211.483M1.7×0.351.351.4211.321No.4-48(2.845)2.42.4582.271 #5 -40G52.972.876.66.5M1.8×0.21.601.6211.583M1.8×0.351.451.5211.421No.5-44(3.175)2.72.742.551 #6 -32G53.223.1187.9M2.0×0.251.751.7851.729M2.0×0.41.601.6791.576No.6-40(3.505)2.93.0222.82 #8 -32G63.893.789.49.3M2.2×0.251.951.9851.929M2.2×0.451.751.8381.713No.8-36(4.166)3.53.6063.404 #10 -24G64.444.310.710.5M2.3×0.252.052.0852.029M2.3×0.41.901.9791.867No.10-32(4.826)4.14.1653.963 #12 -24G65.074.9612.312M2.5×0.352.202.2212.121M2.5×0.452.102.1382.013No.12-28(5.846)4.64.7244.496 1/4" -20G75.865.7313.713.5M2.6×0.352.202.3212.221M2.6×0.452.202.2382.1132001/4/285.55.5885.36 5/16" -18G77.387.2316.716.5M3.0×0.352.702.7212.621M3.0×0.52.502.5992.4595/16 -246.97.0356.782 3/8" -16G78.898.7219.519.3M3.5×0.353.203.2213.121M3.5×0.62.903.0102.8502003/8/248.58.6368.382 7/16" -14G810.410.0222.422M4.0×0.53.503.5993.459M4.0×0.73.303.4223.2427/16 -209.910.0339.729 1/2" -13G811.9211.72524.8M4.5×0.54.004.0993.959M4.5×0.753.803.8783.6881/2-2011.511.60711.32928.328M5.0×0.54.504.5994.459M5.0×0.84.204.3344.1349/16 -1812.913.08112.751 0 -80G51.451.39M5.5×0.55.005.0994.959M6.0×1.05.005.1534.9175/8一1814.514.68114.351 1 -72G51.7711.7M6.0×0.755.305.3785.188M7.0×1.06.006.1535.9173/4一1617.517.67817.323 2 -64G42.061.98M6.0×0.55.505.5995.459M8.0×1.256.806.9126.6477/8一1420.520.67520.27 3 -56G42.372.29M7.0×0.756.306.3786.188M9.0×1.257.807.9127.6471一1223.223.57123.114 4 -48G52.682.59M7.0×0.56.506.5996.459M10×1.58.508.6768.3761-1/8-1226.526.74626.289 5 -44G52.992.9标准径钻孔径M8.0×1.07.007.1536.917M11×1.59.509.6769.3761-1/4-1229.529.92129.464 6 -40G53.293.19最大最小M8.0×0.757.307.3787.188M12×1.7510.3010.44110.1061-3/8-1232.833.09632.639 8 -36G53.913.81M8.0×0.57.507.5997.459M14×2.012.0012.21011.8351-1/2-123636.27135.814 10 -32G64.534.446.56.6326.49M9.0×1.08.008.1537.917M16×2.014.0014.21013.835 12 -28G65.135.038.58.6378.495 M9.0×0.758.308.3788.188M18×2.515.5015.74415.294 1/4" -28G765.9111.411.54911.341M10×1.258.808.9128.647M20×2.517.5017.74417.294 5/16" -24G77.537.421515.05414.846M10×1.09.009.1538.917M22×2.519.5019.74419.294最大最小 3/8" -24G79.18.9918.518.77318.489M10×0.759.309.3789.188M24×3.021.0021.25220.752No.12-324.74.8264.623 7/16" -20G810.6210.482424.25923.975M10×0.59.509.5999.459M27×3.024.0024.25223.7521/4 -325.65.695.486 1/2" -20G812.212.0630.230.47130.111M11×1.010.0010.1539.917M30×3.526.5026.77126.2115/16 -327.17.2647.08738.839.13238.772M11×0.7510.3010.37810.188M33×3.529.5029.77129.2113/8 -328.78.8658.66144.845.02544.665M12×1.510.5010.67610.376M36×4.032.0032.27031.6707/16 -2810.210.33810.13556.556.83656.476M12×1.2510.8010.91210.647M39×4.035.0035.27034.6701/2一2811.811.93811.709M12×1.011.0011.15310.9179/16 -2413.213.38613.132规格精度最大最小M12×0.511.5011.59911.4595/8一2414.814.98614.732M1.0×0.25G40.920.89M14×1.512.5012.67612.3763/7一2017.817.95817.678M1.2×0.25G41.121.09标准径M14×1.013.0013.15312.917最大最小7/8一502121.13320.853M1.4×0.30G41.31.26M15×1.513.5013.67613.376(螺丝牙外径）1一202424.30824.028M1.6×0.35G41.471.42M15×1.014.0014.15313.917No.1 -64(1.854)1.551.5821.425M1.7×0.35G41.571.52PT 1/16 - 286.16.26.2446.384M16×1.514.5014.67614.376No.2 -56(2.184)1.81.8711.695M1.8×0.35G41.671.62PT 1/8 - 288.18.28.2498.388M16×1.015.0015.15314.917No.3 -48(2.515)2.12.1461.941M2.0×0.40G41.841.79PT 1/4 - 1910.71110.96211.174M17×1.515.5015.67615.376No.4 -40(2.845)2.32.3852.157M2.2×0.45G52.041.97PT 3/8 - 1914.214.514.44814.658M17×1.016.0016.15315.917No.5 -40(3.175)2.62.6972.487规格标准径最大最小M2.3×0.40G42.142.09PT 1/2 - 1417.61817.97918.263M18×2.016.0016.21015.835No.6 -32(3.505)2.82.8952.642SM1/16 - 801.251.2811.211M2.5×0.45G52.342.27PT 3/4 - 142323.523.37823.663M18×1.516.5016.67616.376No.8 -32(4.166)3.43.533.302SM5/64 - 641.551.5931.513M2.6×0.45G52.442.37PT 1- 112929.529.45929.822M18×1.017.0017.15316.917No.10-24(4.826)3.93.9623.683SM3/32 - 561.901.9361.841M3.0×0.50G52.822.75PT 1-1/4 - 1137.53837.97638.339M20×2.018.0018.21017.835No.12-24(5.486)4.54.5974.344SM3/32 -1002.102.1562.081M3.5×0.60G53.273.19PT 1-1/2 - 1143.44443.86944.232M20×1.518.5018.67618.3761/4 --20(6.35)5.15.2574.979SM1/8 - 322.302.3932.233M4.0×0.70G63.723.65PT 2 - 1154.955.555.41255.844M20×1.019.0019.15318.9175/16 -18(7.93)6.66.7316.401SM1/8 - 402.502.5512.421M5.0×0.80G64.674.59M22×2.020.0020.21019.8353/8—16(9.52)88.1537.798SM1/8 - 442.502.6052.485M6.0×1.0G75.595.49M22×1.520.5020.67620.3767/16—14(11.11)9.49.559.144SM1/8 - 482.602.6572.547M7.0×1.0G76.596.49M22×1.021.0021.15320.9171/2—13(12.7)10.811.02310.592SM9/64 - 322.702.792.630M8.0×1.25G77.497.36M24×2.022.0022.21021.8359/16—12(14.28)12.212.44611.989SM9/64 - 402.902.9482.818M10×1.50G79.349.22M24×1.522.5022.67622.3765/8—11(15.87)13.612.86813.386 SM11/64 -323.503.5843.424M10×1.25G79.499.35M24×1.023.0023.15322.9173/4—10(19.05)16.518.8416.307 SM11/64 -403.703.7423.612M12×1.75G811.2311.096.76.8436.561M25×2.023.0023.21022.8357/8—9(22.22)19.519.76119.177SM3/16 - 243.603.6583.498M12×1.25G911.511.368.78.8488.566M25×1.523.5023.67623.3761—8(25.4)22.222.60621.971SM3/16 - 283.803.8443.68411.711.8911.445M25×1.024.0024.15323.9171-1/8-7(28.57)2525.34924.638SM3/16 - 323.903.983.82015.215.39514.95M26×1.524.5024.67624.3761-1/4-728.228.52427.813SM3/16 - 404.054.1384.0081919.17218.631M27×2.025.0025.21024.8351-3/8-630.831.11530.353SM7/32 - 324.704.7744.6142121.12850.587M27×1.525.5025.67625.3761-1/2-63434.2933.528SM15/64 -285.005.0554.87524.524.65824.117M27×1.026.0026.15325.9171-3/4-539.539.82738.964SM1/4 - 245.205.2665.08628.228.41827.877M28×2.026.0026.21025.8352 -4-1/245.245.59344.679SM1/4 - 285.405.4525.27230.630.93130.291M28×1.526.5026.67626.376SM1/4 - 405.605.7265.59635.235.59238.952M28×1.027.0027.15326.917SM9/32 - 205.705.8245.63439.229.59238.952M30×3.027.0027.25226.752SM9/32 - 286.206.2566.0664545.48544.845M30×2.028.0028.21027.835最大最小SM5/16 - 186.306.4446.2545151.42850.788M30×1.528.5028.67628.376No.12-324.74.8264.623SM5/16 - 246.806.8646.674使用绞刀时不用绞刀时5757.29656.656M30×1.029.0029.15328.9171/4 -325.65.695.486SM5/16 - 286.907.056.8601/16 -276.16.256.35M32×2.030.0030.21029.8355/16 -327.17.2647.087SM11/32 -287.707.8437.6531/8一278.338.438.74M32×1.530.5030.67630.3763/8 -328.78.8658.661SM3/8 - 187.908.0537.8431/4一1810.7211.1311.13英 制 电 器 螺 纹W1 -8W1-1/8 -7W1-1/4 -7螺丝攻牙钻孔径对照表本表依据2级牙制定，由于钻头的形状，精度及被加工材质等对钻孔尺寸精度有很大影响，若有不当之处，应视实际状况适当变更钻头直径
最大最小最大最小G4-G6G7-G8G9G4-G6G7-G8G9硬材软材M1.0*0.250.750.7850.729M12*1.011.0011.15310.917M1.0*0.250.860.88-No 2 - 56UNC1.94--W1/8 - 402.652.60M1.1*0.250.850.8850.829M12*0.511.5011.52011.400M1.1*0.250.960.98-No 3 - 482.23--W5/32 - 323.253.20M1.2*0.250.950.9850.929M14*1.512.5012.67612.376M1.2*0.251.061.08-No 4 - 402.50--W3/16 - 243.753.70M1.4*0.301.001.1421.075M14*1.013.0013.15312.917M1.4*0.301.241.25-No 5 - 402.83--W1/4 - 205.105.00M1.6*0.351.251.3211.221M15*1.513.5013.67613.376M1.6*0.351.411.43-No 6 - 323.07--W5/16 - 18 6.606.50M1.7*0.351.351.4211.321M15*1.014.0014.15313.917M1.7*0.351.511.53-No 8 - 323.733.77-W3/8 - 168.007.90M1.8*0.351.451.5211.421M16.1.514.5014.67614.376M1.8*0.351.611.63-No10 - 244.244.30-W7/16 - 149.409.30M2.0*0.401.601.6791.567M16*1.015.0015.15314.917M2.0*0.401.781.80-No12 - 244.904.96-W1/2 - 1210.7010.50M2.2*0.451.751.8381.713M17*1.515.5015.67615.376M2.2*0.451.951.98-1/4 - 20-5.72-W9/16 - 1212.3012.00M2.3*0.401.901.9791.867M17*1.016.0016.15315.917M2.3*0.402.082.10-5/16 - 18-7.24-W5/8 - 1113.7012.50M2.5*0.452.102.1382.013M18*2.016.0016.21015.835M2.5*0.452.252.28-3/8 - 16-8.748.81W3/4 - 1016.7013.50M2.6*0.452.202.2382.113M18*1.516.5016.67616.976M2.6*0.452.352.38-7/16 - 14-10.2010.30W7/8 - 919.5016.50M3.0*0.502.502.5992.459M18*1.017.0017.15316.917M3.0*0.502.732.75-1/2 - 13-11.2711.82W1 - 822.4019.30M3.0*0.602.402.4402.280M20*2.018.0018.21017.835M3.5*0.603.173.20-No 2 - 64UNF1.97--W1-1/8 - 725.0024.80M3.5*0.602.903.0102.850M20*1.518.5018.67618.376M4.0*0.703.623.653.69No 3 - 562.27--W1-1/4 - 728.3028.00M4.0*0.703.303.4223.242M20*1.019.0019.15318.917M5.0*0.804.564.604.64No 4 - 482.56--M4.0*0.753.253.3263.106M22*2.020.0020.21019.835M6.0*1.005.455.505.55No 5 - 442.66--M4.5*0.753.803.8783.688M22*1.520.5020.67620.376M7.0*1.006.456.506.55No 6 - 403.16--M5.0*0.804.204.3344.134M22*1.021.0021.15320.917M8.0*1.257.317.387.44No 8 - 363.78--M5.0*0.904.104.1703.930M24*2.022.0022.21021.835M10*1.509.189.259.32No 10- 324.394.43-M6.0*1.005.005.1534.917M24*1.522.5022.67622.376M10*1.259.319.389.44No 12 -284.995.04-M7.0*1.006.006.1535.917M24*1.023.0023.15322.917M12*1.7511.0411.1211.211/4 -285.855.90-SM1/8 - 402.735 - 2.688M8.0*1.256.806.9126.647M25*2.023.0023.21022.835M12*1.2511.3111.3811.445/16 -247.367.41-SM1/8 - 442.769 - 2.722M9.0*1.257.807.9127.647M25*1.523.5023.67623.3763/8 -24-9.00-SM9/64 - 403.128 - 3.083M10*1.508.508.6768.376M25*1.024.0024.15323.9177/16 -20-10.4810.54SM11/64 - 403.855 - 3.805M11*1.509.509.6769.376M26*1.524.5024.67624.3761/2 -20-12.0712.13SM3/16 - 324.205 - 4.155M12*1.7510.3010.44110.160M27*2.025.0025.21024.835SM3/16 - 284.143 - 4.093M14*2.0012.0012.21011.835M27*1.525.5025.67625.376SM7/32 - 325.003 - 4.955M16*2.0014.0014.21013.835M27*1.026.0026.15325.917SM15/64 - 285.325 - 5.570M18*2.5015.5015.74415.294M28*2.026.0026.21025.835SM1/4 - 405.890 - 5.735M20*2.5017.5017.74417.294M28*1.526.5026.67626.376SM1/4 - 285.721 - 5.366M22*2.5019.5019.74419.294M28*1.027.0027.15326.917最大最小SM9/32 - 286.508 - 5.648M24*3.0021.0021.25220.752M30*3.027.0027.15226.752最大最小PS 1/16 - 286.506.6326.490SM11/32 - 288.092 - 8.432M27*3.0024.0024.25223.752M30*2.028.0028.21027.835No 1-64(1.854)1.551.5821.425PS 1/8 - 288.508.6378.495SM3/8 - 288.880 - 8.015M30*3.5026.5026.77126.211M30*1.528.5028.67628.376No 2-56(2.184)1.801.8711.695PS 1/4 - 1911.4011.54911.341SM7/16 - 2810.466 - 10.401M30*1.029.0029.15328.917No 3-48(2.515)2.102.1461.941PS 3/8 - 1915.0015.05414.846SM7/16 - 1610.037 - 9.967M32*2.030.0030.21029.835No 4-40(2.845)2.302.3852.157PS 1/2 - 1418.5018.77318.489SM1/2 - 2011.819 - 11.749M32*1.530.5030.67630.376No 5-40(3.175)2.602.6972.487PS 3/4 - 1424.0024.25923.975SM9/16 - 2013.400 - 13.425最大最小M33*1.030.0030.25229.752No 6-32(3.505)2.802.8952.642PS 1 - 1130.2030.47130.111M1.0*0.20.800.8210.783M33*2.031.0031.21030.835No 8-32(4.166)3.403.5303.302PS 1-1/4 - 1138.8039.13238.772M1.1*0.20.900.9210.883M33*1.531.5031.67631.376No 10-24(4.826)3.903.9623.683PS 1-1/2 - 1144.8045.02544.665M1.2*0.21.001.0210.983M35*1.533.5033.67633.376No 12-24(5.486)4.504.5974.344PS 2 - 1156.5056.83656.476M1.4*0.21.201.2211.183M36*3.033.0033.25232.752 1/4 - 205.105.2574.979M1.6*0.21.401.4211.383M36*2.034.0034.21033.835 5/16 - 186.606.7316.401M1.7*0.21.451.5001.460M36*1.534.5034.67634.376 3/8 - 168.008.1537.798M3*0.52.63 - 2.60M1.8*0.21.601.6211.583 7/16 - 149.409.5509.144M3.0*0.62.56 - 2.50M2.0*0.251.751.7851.729 1/2 - 1310.8011.02310.592M3.5*0.63.06 - 3.03M2.2*0.251.951.9851.929 9/16 - 1212.2012.44611.989使用绞刀时不使用绞刀时M4.0*0.73.49 - 3.45M2.3*0.252.052.6102.001 5/8 - 1113.6012.86813.386PT 1/16 - 286.106.206.244M4.0*0.753.45 - 3.41M2.5*0.352.202.2212.121最大最小 3/4 - 1016.5018.84016.307PT 1/8 - 288.108.208.249M4.5*.753.96 - 3.92M2.6*0.352.202.2462.186No 0-80(1.524)1.251.3051.182 7/8 - 919.5019.76119.177PT 1/4 - 1910.7011.0010.962M5.0*0.84.43 - 4.38M3.0*0.352.702.7212.621No 1-72(1.854)1.551.6121.474 1 - 822.2022.60621.971PT 3/8 - 1914.2014.5014.448M5.0*0.94.36 - 4.31M3.5*0.353.203.2213.121No 2-64(2.184)1.851.9121.756 1-1/8 - 725.0025.34924.638PT 1/2 - 1417.6018.0017.979M6.0*1.05.30 - 5.25M4.0*0.53.503.5993.459No 3-58(2.515)2.102.1972.025 1-1/4 - 728.2028.52427.813PT 3/4 - 1423.0023.5023.378M7.0*1.06.30 - 6.25M4.5*0.54.004.0993.959No 4-48(2.845)2.402.4582.271 1-3/8 - 630.8031.11530.353PT 1 - 1129.0029.5029.459M8.0*1.07.28 - 7.23M5.0*0.54.504.5994.459No 5-44(3.175)2.702.7402.551 1-1/2 - 634.0034.29033.528PT 1-1/4 - 1137.5038.0037.976M8.0*1.257.12 - 7.07M5.5*0.55.005.0994.959No 6-40(3.506)2.903.0222.820 1-3/4 - 539.5039.82738.964PT 1-1/2 - 1143.4044.0043.869M6.0*0.755.305.3785.188No 8-36(4.166)3.503.6063.4042 - 4-1/245.2045.59344.679PT 2 - 1154.9055.5055.412M6.0*0.55.505.5505.400No 10-32(4.826)4.104.1653.963M7.0*0.756.306.3786.188No 12-28(5.846)4.604.7244.496M7.0*0.56.506.5506.4001/4 - 285.505.5885.360M8.0*1.07.007.1536.9175/16 - 246.907.0356.782M8.0*0.757.307.3787.1883/8 - 248.508.6368.382最大最小M8.0*0.57.507.5207.4007/16 - 209.9010.0339.729No 12 - 324.7004.8264.623使用绞刀时不使用绞刀时2BA4.0 - 4.2M9.0*1.08.008.1537.9171/2 - 2011.5011.60711.3291/4 - 325.6005.6905.4861/16 - 276.106.256.353BAM9.0*0.758.308.3788.1889/16 - 1812.9013.08112.7515/16 - 327.1007.2647.0871/8 - 278.338.438.744BA3.0 - 3.2M10*1.258.808.9128.6475/8 - 1814.5014.68114.3513/8 - 328.7008.8658.6611/4 -1810.7211.1311.135BA2.7 - 2.8M10*1.09.009.1538.9173/4 - 1617.5017.67817.3237/16 - 2810.20010.33810.1353/8 -1814.2714.2714.686BA2.4 - 2.5M10*0.759.309.3789.1887/8 - 1420.5020.57520.2701/2 - 2811.80011.93811.7091/2 -1417.4817.8618.26M10*0.59.509.5209.4001 - 1223.2023.57123.1149/16 - 2413.20013.38613.1323/4 -1422.6323.0123.42M11*1.010.0010.1538.9171-1/8 - 1226.5026.74626.2895/8 - 2414.80014.98614.7321 -11-1/228.5828.9829.36M11*0.7510.3010.37810.1881-1/4 - 1229.5029.92129.4643/4 - 2017.80017.95817.6781-1/4-11-1/237.3137.6938.10M12*1.5010.5010.67610.3761-3/8 - 1232.8033.09632.6397/8 - 2021.00021.13320.8531-1/2-11-1/243.6644.0444.45M12*1.2510.8010.91210.6471-1/2 - 1236.0036.27135.8141 - 2024.00024.30824.0282 -11-1/255.5855.9656.36钻孔径规格滚造径
自攻螺丝规格大全
在我们的日常生活和各种工业领域中，自攻螺丝是一种非常常见且重要的紧固件。它具有独特的特点和广泛的应用，而其规格的多样性更是满足了不同场景的需求。接下来，就让我们一起深入了解自攻螺丝的规格世界。
自攻螺丝的规格主要涵盖了几个关键的方面，包括螺丝的头部形状、螺纹类型、长度、直径以及材质等。
首先，从头部形状来看，常见的有盘头、沉头、半沉头、六角头、圆柱头等等。盘头自攻螺丝的头部呈圆形，顶部较为扁平，安装后螺丝头部会略微突出于被固定物体表面，常用于一般的紧固连接；沉头自攻螺丝的头部则是锥形，安装后头部可以与被固定物体表面平齐，使外观更加平整美观，适用于对表面平整度有要求的场合；半沉头自攻螺丝则介于盘头和沉头之间；六角头自攻螺丝具有较大的扭矩承受能力，常用于需要较大紧固力的场合；圆柱头自攻螺丝的头部呈圆柱形，常用于家具制造等领域。
其次，螺纹类型也是自攻螺丝规格的重要组成部分。常见的有标准自攻螺纹和细牙自攻螺纹。标准自攻螺纹具有较强的攻入能力，适用于较软的材料；细牙自攻螺纹则具有更好的紧固性能，适用于对紧固要求较高的场合。 自攻螺丝的长度也是一个关键规格。长度的测量通常是从螺丝头部的底部到螺丝尖端的距离。常见的长度规格从几毫米到几十毫米不等。在选择长度时，需要考虑被固定物体的厚度以及所需的紧固深度。如果螺丝过长，可能会穿透物体造成损坏；如果螺丝过短，则无法提供足够的紧固力。
直径方面，自攻螺丝通常有多种直径规格可供选择。较小直径的自攻螺丝适用于轻薄材料的固定，而较大直径的自攻螺丝则能够提供更强的紧固力，适用于厚重材料或承受较大载荷的场合。
材质也是决定自攻螺丝性能和适用范围的重要因素。常见的材质有碳钢、不锈钢、铝合金等。碳钢自攻螺丝强度较高，价格相对较低，但耐腐蚀性较差；不锈钢自攻螺丝具有良好的耐腐蚀性，适用于潮湿或腐蚀性环境；铝合金自攻螺丝则重量轻，但强度相对较低。
此外，自攻螺丝还有不同的表面处理方式，如镀锌、镀铬、发黑等。这些表面处理不仅可以提高螺丝的美观度，还能增强其防锈和耐腐蚀性能。
