精品文献
英制螺纹底孔对照表
公英制螺纹底孔对照表
英制螺纹 对应公制（ mm) 底孔直径 公制螺纹 底孔直径 1/8" 3.18 2.70 M1.0 0.80 5/32" 3.97 3.30 M2.0 1.80 3/16" 4.76 3.80 M3.0 2.50 1/4" 6.35 5.10 M4.0 3.30 5/16" 7.94 6.60 M5.0 4.20 3/8" 9.53 8.00 M6.0 5.00 7/16" 11.11 9.40 M7.0 6.00 1/2" 12.70 10.70 M8.0 6.80 5/8" 15.88 13.70 M9.0 7.80 3/4" 19.05 16.70 M10.0 8.50 7/8" 22.23 19.50 M12.0 10.30 1" 25.40 22.40 M14.0 12.00 M16.0 14.00 M18.0 15.50 M20.0 17.50 M22.0 19.50 M24.
公英制螺纹底孔对照表
英制螺纹 对应公制（ mm) 底孔直径 公制螺纹 底孔直径 1/8" 3.18 2.70 M1.0 0.80 5/32" 3.97 3.30 M2.0 1.80 3/16" 4.76 3.80 M3.0 2.50 1/4" 6.35 5.10 M4.0 3.30 5/16" 7.94 6.60 M5.0 4.20 3/8" 9.53 8.00 M6.0 5.00 7/16" 11.11 9.40 M7.0 6.00 1/2" 12.70 10.70 M8.0 6.80 5/8" 15.88 13.70 M9.0 7.80 3/4" 19.05 16.70 M10.0 8.50 7/8" 22.23 19.50 M12.0 10.30 1" 25.40 22.40 M14.0 12.00 M16.0 14.00 M18.0 15.50 M20.0 17.50 M22.0 19.50 M24.