螺丝及沉头孔尺寸表规格螺丝头直螺丝头厚螺丝杆直沉头沉头通过普通普通径度径孔直孔深孔直平垫平垫径度径圈外圈厚径度M23.84.53.02.5M35.56.03.53.57M47.07.54.54.590.8M58.559.05.55.5101M610.065.8116.56.5121.6M812.087.8138.58.5161.6M1015.0109.81610.510.5202M1217.812.511.81912.512.5242.5M14M16241615.92616.517M18M20M22M24六角承孔头螺丝[JISB1176(1988)*JISB1176(1976)拔粹参考:对六角承孔头螺丝的沉头及螺丝孔的尺寸螺丝称号(d)M3M4M5M6M8M10M12(M14)M16M20M24M30螺牙节距(p)0.50.70.811.251.51.75222.533.5b参考182022242832364044526072最大(基准尺5.578.5101316182124303645寸)dk最大5.687.228.7210.2213.2716.2718.2721.3324.3330.3336.3945.39最小5.326.788.289.7812.7315.7317.7320.6723.6729.6735.6144.61螺丝称号(d)M3M4M5M6M8M10M12M14M16M20M24M30ds3.3456810121416202430ds’3.44.55.56.6911141618222633dk5.578.5101316182124303645dk′6.589.5111417.5202326323948k3456810121416202430k′2.73.64.65.57.49.21112.814.518.522.528k′′3.34.45.46.58.610.81315.217.521.525.532da最大3.64.75.76.89.211.213.715.717.722.426..433.4最大(基准尺3456810121416202430ds寸)最小2.863.824.825.827.789.7811.7313.7315.7319.6723.6729.67最大(基准尺3456810121416202430寸)最小2.863.824.825.707.649.6411.5713.5715.5719.4823.4829.48r最小0.10.20.20.250.40.40.60.60.60.80.81基准尺寸2.534568101214171922最小2.523.024.025.026.028.02510.0212.0314.0317.0519.0622.06522055s1栏2.5803.0804.0955.1406.1408.17510.1112.2114.2117.2319.2722.27522055最大(1)2.5603.0804.0955.0956.0958.11510.1112.1414.1417.2319.2722.272栏522055t最小1.322.5345688101215.5(1)S(最大)之第1栏,适用于强度区分8.8及10.9者及形状区分A2-50,A2-70者,第2栏适用于强度区分12.9者,可依供需双方
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,将强度区分12.9者适用第一栏.螺丝称号M20以上的S(最大),可适用于全部强度区分及性情区分者.(2)头部侧面应施予直条刻纹等压在刻纹[JISB0591(金花刻纹)],此时,dk(最大)为本表所示,**记号的数值,不需压花刻纹者,由订购人径行指定.此时的dk(最大)为本表所示附*记号的数值.
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