---公制牙規格---

公制牙規格(mm)
號稱	牙距	外徑
		最大	最小
1.4	0.3	1.380	1.320
1.6	0.35	1.581	1.496
1.7	0.35	1.680	1.610
2.0	0.4	1.980	1.890
2.3	0.4	2.280	2.190
2.6	0.45	2.580	2.480
3.0	0.5	2.980	2.874
3.0	0.6	2.980	2.870
3.5	0.6	3.470	3.360
4.0	0.7	3.978	3.838
4.0	0.75	3.978	3.838
4.5	0.75	4.470	4.340
5.0	0.8	4.976	4.826
5.0	0.9	4.970	4.820
6.0	1.0	5.970	5.820
7.0	1.0	6.970	6.820
8.0	1.25	7.960	7.790
10.0	1.25	9.960	9.790
10.0	1.5	9.960	9.770
12.0	1.5	11.96	11.770
12.0	1.75	11.950	11.760
14.0	2.0	13.950	13.740
16.0	2.0	15.950	15.740