螺絲攻牙鉆孔徑和滾造徑對照表--細紋

公制細螺紋				美制細螺紋
規格	標準徑	2級牙鉆孔徑		規格（UNC）	標準徑	2級牙鉆孔徑
規格	標準徑	最大	最小	規格（UNC）	標準徑	最大	最小
M1.0×0.2	0.80	0.821	0.783	NO.0-80(1.524)	1.25	1.305	1.182
M1.1×0.2	0.90	0.921	0.883	NO.1-72(1.854)	1.55	1.612	1.474
M1.2×0.2	1.00	1.021	0.983	NO.2-64(2.184)	1.85	1.912	1.756
M1.4×0.2	1.20	1.221	1.183	NO.3-56(2.515)	2.10	2.197	2.025
M1.6×0.2	1.40	1.421	1.383	NO.4-48(2.845)	2.40	2.458	2.271
M1.7×0.2	1.45	1.500	1.460	NO.5-44(3.175)	2.70	2.740	2.551
M1.8×0.2	1.60	1.621	1.583	NO.6-40(3.505)	2.90	3.022	2.820
M2.0×0.25	1.75	1.785	1.729	NO.8-36(4.166)	3.50	3.606	3.404
M2.2×0.25	1.95	1.985	1.929	NO.10-32(4.826)	4.10	4.165	3.963
M2.3×0.25	2.05	2.061	2.001	NO.12-28(5.846)	4.60	4.724	4.496
M2.5×0.35	2.20	2.221	2.121	1/4-28	5.50	5.588	5.360
M2.6×0.35	2.20	2.246	2.186	5/16-24	6.90	7.035	6.782
M3.0×0.35	2.70	2.721	2.621	3/8-24	8.50	8.636	8.382
M3.5×0.35	3.20	3.221	3.121	7/16-20	9.90	10.033	9.729
M4.0×0.5	3.50	3.599	3.459	1/2-20	11.50	11.607	11.329
M4.5×0.5	4.00	4.099	3.959	9/16-18	12.90	13.081	12.751
M5.0×0.5	4.50	4.599	4.459	5/8-18	14.50	14.681	14.351
M5.5×0.5	5.00	5.099	4.959	3/4-16	17.50	17.678	17.323
M6.0×0.75	5.30	5.378	5.188	7/8-14	20.50	20.675	20.270
M6.0×0.5	5.50	5.550	5.400	1-12	23.20	23.571	23.114
M7.0×0.75	6.30	6.378	6.188	1-1/8-12	26.50	26.746	26.289
M7.0×0.5	6.50	6.550	6.400	1-1/4-12	29.50	29.921	29.464
M8.0×1.0	7.00	7.153	6.917	1-3/8-12	32.80	33.096	32.639
M8.0×0.75	7.30	7.378	7.188	1-1/2-12	36.00	36.271	35.814
M8.0×0.5	7.50	7.520	7.400
M9.0×1.0	8.00	8.153	7.917
M9.0×0.75	8.30	8.378	8.188
M10×1.25	8.80	8.912	8.647
M10×1.0	9.00	9.153	8.917
M10×0.75	9.30	9.378	9.188
M10×0.5	9.50	9.520	9.400
M11×1.0	10.00	10.153	9.917
M11×0.75	10.30	10.378	10.188
M12×1.5	10.50	10.676	10.376
M12×1.25	10.80	10.912	10.647
M12×1.0	11.00	11.153	10.917
M12×0.5	11.50	11.520	11.400
M14×1.5	12.50	12.676	12.376
M14×1.0	13.00	13.153	12.917
M15×1.5	13.50	13.676	13.376
M15×1.0	14.00	14.153	13.917
M16×1.5	14.50	14.676	14.376
M16×1.0	15.00	15.153	14.917
M17×1.5	15.50	15.676	15.376
M17×1.0	16.00	16.153	15.917
M18×2.0	16.00	16.210	15.835
M18×1.5	16.50	16.676	16.376
M18×1.0	17.00	17.153	16.917
M20×2.0	18.00	18.210	17.835
M20×1.5	18.50	18.676	18.376
M20×1.0	19.00	19.153	18.917
M22×2.0	20.00	20.210	19.835
M22×1.5	20.50	20.676	20.376
M22×1.0	21.00	21.153	20.917
M24×2.0	22.00	22.210	21.835
M24×1.5	22.50	22.676	22.376
M24×1.0	23.00	23.153	22.917
M25×2.0	23.00	23.210	22.835
M25×1.5	23.50	23.676	23.376
M25×1.0	24.00	24.153	23.917
M26×1.5	24.50	24.676	24.376
M27×2.0	25.00	25.210	24.835
M27×1.5	25.50	25.676	25.376
M27×1.0	26.00	26.153	25.917
M28×2.0	26.00	26.210	25.835
M28×1.5	26.50	26.676	26.376
M28×1.0	27.00	27.153	26.917
M30×3.0	27.00	27.252	26.752
M30×2.0	28.00	28.210	27.835
M30×1.5	28.50	28.676	28.376
M30×1.0	29.00	29.153	28.917
M32×2.0	30.00	30.210	29.835
M32×1.5	30.50	30.676	30.376
M33×3.0	30.00	30.252	29.752
M33×2.0	31.00	31.210	30.835
M33×1.5	31.50	31.676	31.376
M35×1.5	33.50	33.676	33.376
M36×3.0	33.00	33.252	32.752
M36×2.0	34.00	34.210	33.835
M36×1.5	34.50	34.676	34.376