常用螺栓的标准及规格表国家标准规定了螺纹规格为 M3~M64, A 和 B 级的六角头螺栓.A 级用于 D<=24 和 L<=10D 或卜=15000〔按较小值〕的螺栓;B 级用于 D>24 或 L>10D 或 1>150〔按 较小值〕的螺栓外六角螺栓尺寸规格〔如图〕钢结构连接用螺栓性能等级分 3.6、4.6、4.8、5.6、6.8、8.8、9.8、10.9、12.9 等 10 余个等 级,其中 8.8 级及以上螺栓材质为低碳合金钢或中碳钢并经热处理〔淬火、回火〕,通称 为高强度螺栓,其余通称为普通螺栓.螺栓性能等级标号有两局部数字组成,分别表示螺 栓材料的公称抗拉强度值和屈强比值.例如,性能等级 4.6 级的螺栓,其含义是：1、螺栓材质公称抗拉强度达 400MPa 级；2、螺栓材质的屈强比值为 0.6；3、螺栓材质的公称屈服强度达 400x0.6=240MPa 级常用螺丝规格表类别规格牙距成品外径线径类别规格牙数〔每 英寸〕成品外径线径最大最小±0.02mm最大最小±0.02mm国 标 粗 牙60°M1.40.301.381.341.16英 制 粗 牙 55°1/8403.1453.032.70M1.70.351.681.611.425/32323.9453.7953.38M2.00.401.981.891.683/16244.7324.5924.00M2.30.402.282.191.981/4206.326.1655.45M2.50.452.482.382.155/16187.9057.7376.94M3.00.502.982.882.603/8169.499.3128.40M3.50.603.473.363.027/161411.0710.889.84M4.00.703.983.833.401/21212.6612.4611.22M4.50.754.474.363.889/161214.2514.0412.81M5.00.804.984.834.305/81115.8315.6114.27M6.01.005.975.825.18美 制 粗 牙60°4#402.8242.6952.37M7.01.006.976.826.185#403.1543.0262.69M8.01.257.967.797.026#323.4843.3332.91M9.01.258.968.798.018#324.1423.9913.57M101.509.969.778.8410#244.84.6184.05M111.5010.9710.739.8412#245.4615.2794.70M121.7511.9511.7610.71/4206.3226.1175.45M142.0013.9513.7412.55/16187.9077.6876.93M162.0015.9515.7414.53/8169.4919.2548.40M182.5017.9517.7116.27/161411.0810.829.83M202.5019.9519.7118.21/21312.6612.3911.32国 标 细 牙60°M4.00.503.973.863.589/161214.2513.9612.80M4.50.504.474.364.075/81115.8315.5314.26M5.00.504.974.864.57美 制 粗 牙60°4#482.8772.7132.44M6.00.755.975.855.415#443.1573.0362.73M7.00.756.976.856.416#403.4843.3563.02M8.01.007.977.837.248#364.1454.0063.63M9.01.008.978.838.2410#324.8034.6514.23M101.009.979.829.2312#285.4615.2964.81M1...
