切边和端部截齿的埋头方孔

[中文适用范围]： 该文件已被宣布为“稳定”，并且将不再接受货币定期审查。用户负责验证参考资料和持续适用性或技术要求。新技术可能存在。与 3 号头犁螺栓（参考 ANSI B18.9）一起用于切削刃和端部钻头，通常用于越野自行式作业机械，如 SAE J1116 中所述。切削刃进一步符合 SAE J737、J739 和 J1304。 SAE J63 中进一步定义了结束位。 [外文原描述]： To be used on cutting edges and end bits in conjunction with No. 3 head plow bolts (Ref. ANSI B18.9) typically used on off-road self-propelled work machines as described in SAE J1116.Cutting edges are further defined in SAE J737, J739 and J1304.End bits are further defined in SAE J63.1When section thickness exceeds A in drawing 1 ( Figure 2 ) (countersunk one side) or B in drawing 4 (countersunk both sides), use counterbore with diameter D, as shown in cross section drawings 2, 5 and 6, or extended countersink C, as shown in cross section drawings 3 and 7.2The inscribed circle of the square holes shall be concentric with countersink or counterbore within 0.03 in (0.8 mm).Cross Reference: ANSI/B18.9,J1116,J1304,J63,J737,J739