内六角沉孔头螺丝的沉头及螺丝孔的尺寸表

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1、六角沉孔头螺丝[JISB1176(1988)*JISB1176(1976)]的沉头及螺丝孔的尺寸ds'φφdsdkdk'φφφdsds'φφφdk'dkk"kddk'kkdklbsdkdadsφφφr螺丝称号(d)M3M4M5M6M8M10M12M14M16M20M24M30ds3.3456810121416202430ds’3.44.55.56.6911141618222633dk5.578.5101316182124303645dk´6.589.5111417.5202326323948k3456810121416202430k´2.73.64.6

2、5.57.49.21112.814.518.522.528k´´3.34.45.46.58.610.81315.217.521.525.532螺丝称号(d)M3M4M5M6M8M10M12(M14)M16M20M24M30螺牙节距(p)0.50.70.811.251.51.75222.533.5b参考182022242832364044526072dk最大(基准呎吋)5.578.5101316182124303645最大5.687.228.7210.2213.2716.2718.2721.3324.3330.3336.3945.39最小5.326.78

3、8.289.7812.7315.7317.7320.6723.6729.6735.6144.61da最大3.64.75.76.89.211.213.715.717.722.426..433.4ds最大(基准呎吋)3456810121416202430最小2.863.824.825.827.789.7811.7313.7315.7319.6723.6729.67k最大(基准呎吋)3456810121416202430最小2.863.824.825.707.649.6411.5713.5715.5719.4823.4829.48r最小0.10.20.20.

4、250.40.40.60.60.60.80.81s基准呎吋2.534568101214171922最小2.523.024.025.026.028.02510.02512.03214.03217.05019.06522.065最大(1)1栏2.5803.0804.0955.1406.1408.17510.11512.21214.21217.23019.27522.2752栏2.5603.0804.0955.0956.0958.11510.11512.14214.14217.23019.27522.275t最小1.322.5345688101215.5(1

5、)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,可依供需双方协议,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.