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Counterbore
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                                                  B. Milling machine                   D. Milling machine  YIH TROUN ENTERPRISE CO.,LTD











             Machines And Tools Application



                Suitable for various kinds of machines  A. Drill machine               C. Radial drilling machine

























             Bolt counter bore dimensions ( DIN 373 - ISO 4205)

                           Screw ( D x d )   D  d  2.2 x 0.75  2.5 x 0.95  2.8 x 1.1  3.3 x 1.25  3.8 x 1.3  4.3 x 1.6  4.8 x 2.6  5.0 x 1.9  5.5 x 2.1  6.0 x 2.5  6.5 x 2.9  8.0 x 3.3  10.0 x 4.2  11.0 x 5.0  15.0 x 6.8  18.0 x 8.5  20.0 x 10.2  -  -









                           Large ( D x d )   D  d  2.2 x 1.2  2.5 x 1.4  2.8 x 1.6  3.3 x 1.8  3.8 x 1.9  4.3 x 2.4  4.8 x 2.6  5.2 x 2.9  5.5 x 3.0  6.0 x 3.4  6.5 x 3.9  8.0 x 4.5  10.0 x 5.5  11.0 x 6.6  15.0 x 9.0  18.0 x 11  20.0 x 14  24.0 x 16  26.0 x 18








                           Standard ( D x d )        D  d  2.1 x 1.1  2.4 x 1.3  2.7 x 1.5  3.2 x 1.7  3.7 x 1.8  4.2 x 2.2  4.6 x 2.4   5.0 x 2.7  5.4 x 2.8  5.8 x 3.2  6.3 x 3.7  7.4 x 4.3  9.3 x 5.3  10.4 x 6.4  13.5 x 8.4  16.5 x 10.5  19.0 x 13  24.0 x 15  26.0 x 17    YIH TROUN ENTERPRISE CO.,LTD










                          Screw   Dimensions  Dimension  M1.0  M1.2  M14  M1.5-M1.6  M1.7  M2.0  M2.2  M2.3  M2.5-M2.6  M3.0  M3.5  M4.0  M5.0  M6.0  M8.0  M10  M12  M14  M16


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