螺丝孔径对照表

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螺丝孔径对照表

螺丝攻牙钻孔径对照表
公制粗螺纹
规格	标准径	2级牙钻孔径
规格	标准径	最大	最小
M1.0*0.25	0.75	0.785	0.729
M1.1*0.25	0.85	0.885	0.829
M1.2*0.25	0.95	0.985	0.929
M1.4*0.3	1.10	1.142	1.075
M1.6*0.35	1.25	1.321	1.221
M1.7*0.35	1.35	1.421	1.321
M1.8*0.35	1.45	1.521	1.421
M2.0*0.4	1.60	1.679	1.568
M2.2*0.45	1.75	1.838	1.713
M2.3*0.4	1.90	1.979	1.867
M2.5*0.45	2.10	2.138	2.013
M2.6*0.4	2.20	2.238	2.113
M3.0*0.5	2.50	2.599	2.459
M3.5*0.6	2.90	3.010	2.850
M4.0*0.7	3.30	3.422	3.242
M4.5*0.75	3.80	3.878	3.688
M5.0*0.8	4.20	4.334	4.134
M6.0*1.0	5.00	5.153	4.917
M7.0*1.0	6.00	6.153	5.917
M8.0*1.25	6.80	6.912	6.647
M9.0*1.25	7.80	7.912	7.647
M10.0*1.5	8.50	8.676	8.376
M11.0*1.5	9.50	9.676	9.376
M12.0*1.75	10.30	10.441	10.106
M14.0*2.0	12.00	12.219	11.835
M16.0*2.0	14.00	14.210	13.835
M18.0*2.5	15.50	15.744	15.294
M20.0*2.5	17.50	17.744	17.294
M22.0*2.5	19.50	19.744	19.294
M24.0*3.0	21.00	21.252	20.752
M27.0*3.0	24.00	24.252	23.752
M30.0*3.5	26.50	26.771	26.211

螺丝攻牙钻孔径对照表
公制细螺纹
规格	标准径	2级牙钻孔径
规格	标准径	最大	最小
M1.0*0.2	0.80	0.821	0.783
M1.1*0.2	0.90	0.921	0.883
M1.2*0.2	1.00	1.021	0.983
M1.4*0.2	1.20	1.221	1.183
M1.6*0.2	1.40	1.421	1.383
M1.7*0.2	1.45	1.500	1.460
M1.8*0.2	1.60	1.621	1.583
M2.0*0.25	1.75	1.785	1.729
M2.2*0.25	1.95	1.985	1.929
M2.3*0.25	2.05	2.061	2.001
M2.5*0.35	2.20	2.221	2.121
M2.6*0.35	2.20	2.246	2.186
M3.0*0.35	2.70	2.721	2.621
M3.5*0.35	3.20	3.221	3.121
M4.0*0.5	3.50	3.599	3.459
M4.5*0.5	4.00	4.099	3.959
M5.0*0.5	4.50	4.599	4.459
M5.5*0.5	5.00	5.099	4.959
M6.0*0.5	5.30	5.378	5.188
M7.0*0.75	6.30	6.378	6.188
M7.0*0.5	6.50	6.550	6.400
M8.0*1.0	7.00	7.153	6.917
M8.0*0.75	7.30	7.378	7.188
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	9.92
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	16.153	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

英制螺纹
规格	钻孔径
规格	硬材	软材
W1/8-40	2.65	2.600
W5/32-32	3.25	3.200
W3/16-24	3.75	3.700
W1/4-20	5.10	5.000
W5/16-18	6.60	6.500
W3/8-16	8.00	7.900
W7/16-14	9.40	9.300
W1/2-12	10.70	10.500
W9/16-12	12.30	12.000
W5/8-11	13.70	13.500
W3/4-10	16.70	16.500
W7/8-9	19.50	19.300
W1-8	22.40	22.000
W1-1/8-7	25.00	24.800
W1-1/4-7	28.30	28.000

美制细螺纹
规格	标准径	2级牙钻孔径
规格	标准径	最大	最小
螺丝外牙径
No. 0-80(1.524)	1.25	1.305	1.182
No. 1-72(1.854)	1.55	1.612	1.474
No. 2-64(2.184)	1.85	1.912	1.756
No. 3-56(2.515)	2.10	2.197	2.025
No. 4-48(2.845)	2.40	2.458	2.271
No. 5-44(3.175)	2.70	2.740	2.551
No. 6-40(3.505)	2.90	3.220	2.820
No. 8-36(4.166)	3.50	3.606	3.404
No. 10-32(4.826)	4.10	4.165	3.963
No. 12-28(5.846)	4.60	4.724	4.496
1/4-28	5.50	5.588	5.360
5/16-24	6.90	7.035	6.782
3/8-24	8.50	8.636	8.382
7/16-20	9.90	10.033	9.729
1/2-20	11.50	11.607	11.329
9/16-18	12.90	13.081	12.751
5/8-18	14.50	14.681	14.351
3/4-16	17.50	17.678	17.323
7/8-14	20.50	20.675	20.270
1-12	23.20	23.571	23.144
1-1/8-12	26.50	26.746	26.289
1-1/4-12	29.50	29.921	29.464
1-3/8-12	32.80	33.096	32.639
1-1/2-12	36.00	26.271	35.814
美制粗螺纹
规格	标准径	2级牙钻孔径
规格	标准径	最大	最小
No. 1-64(1.854)	1.55	1.582	1.425
No. 2-56(2.184)	1.80	1.871	1.695
No. 3-48(2.515)	2.10	2.146	1.941
No. 4-40(2.845)	2.30	2.385	2.157
No. 5-40(3.175)	2.60	2.697	2.487
No. 6-32(3.505)	2.80	2.895	2.642
No. 8-32(4.166)	3.40	3.530	3.302
No. 10-24(4.826)	3.90	3.962	3.683
No. 12-24(5.486)	4.50	4.597	4.344
1/4-20	5.10	5.257	4.979
5/16-18	6.60	6.731	6.401
3/8-16	8.00	8.153	7.798
7/16-14	9.40	9.550	9.144
1/2-13	10.80	11.023	10.592
9/16-12	12.20	12.446	11.989
5/8-11	13.60	12.868	13.386
3/4-10	16.50	18.840	16.307
7/8-9	19.50	19.761	19.177
1-8	22.20	22.606	21.971
1-1/8-7	25.00	25.349	24.638
1-1/4-7	28.20	28.254	27.813
1-3/8-6	30.80	31.115	30.353
1-1/2-6	34.00	34.290	33.528
1-3/4-5	39.50	39.827	38.964
2-4-1/2	45.20	45.593	44.679
美制特细螺纹
规格	标准径	2级牙钻孔径
规格	标准径	最大	最小
No. 12-32	4.70	4.826	4.623
1/4-32	5.60	5.690	5.486
5/16-32	7.10	7.264	7.087
3/8-32	8.70	8.865	8.661
7/16-28	10.20	10.338	10.135
1/2-28	11.80	11.938	11.709
9/16-24	13.20	13.386	13.132
5/8-24	14.80	14.986	14.732
3/4-20	17.80	17.958	17.678
7/8-20	21.00	21.133	20.853
1-20	24.00	24.308	24.028

英制管螺纹
规格	标准径	2级牙钻孔径
规格	标准径	最大	最小
1/16-28	6.50	6.632	6.490
1/8-28	8.50	8.637	8.495
1/4-19	11.40	11.549	11.341
3/8-19	15.00	15.054	14.846
1/2-14	18.50	18.773	18.489
3/4-14	24.00	24.259	23.975
1-11	30.20	30.471	30.111
1-1/4-11	38.80	39.132	38.772
1-1/2-11	44.80	45.025	44.665
2-11	56.50	56.836	56.476
美制管螺纹
规格	钻孔径
	NPT		NPS
	使用绞刀时	不用绞刀时	NPS
1/16-27	6.10	6.250	6.350
1/8-27	8.33	8.430	8.740
1/4-18	10.72	11.130	11.130
3/8-18	14.27	14.270	14.680
1/2-14	17.48	17.860	18.260
3/4-14	22.63	23001.000	23.420
1-11-1/2	28.58	28.980	29.360
1-1/4-11-1/2	37.31	37.690	38.100
1-1/2-11-1/2	43.66	44.040	44.450
2-11-1/2	55.58	55.960	56.360
公制迫牙丝攻钻孔径
规格	精度等级
规格	G4-G6	G7-G8	G9
M1.0*0.25	0.86	0.880	—
M1.1*0.25	0.96	0.980	—
M1.2*0.25	1.06	1.080	—
M1.4*0.3	1.24	1.250	—
M1.6*0.35	1.41	1.430	—
M1.7*0.35	1.51	1.530	—
M1.8*0.35	1.61	1.630	—
M2.0*0.4	1.78	1.800	—
M2.2*0.45	1.95	1.980	—
M2.3*0.4	2.08	2.100	—
M2.5*0.45	2.25	2.280	—
M2.6*0.45	2.35	2.380	—
M3.0*0.5	2.73	2.750	—
M3.5*0.6	3.17	3.200	—
M4.0*0.7	3.62	3.650	3.690
M5.0*0.8	4.56	4.600	4.640
M6.0*1.0	5.45	5.500	5.550
M7.0*1.0	6.45	6.500	6.550
M8.0*1.25	7.31	7.380	7.440
M10*1.5	9.18	9.250	9.320
M10*1.25	9.31	9.380	9.440
M12*1.75	11.04	11.120	11.210
M12*1.25	11.31	11.380	11.440
美制迫牙丝攻钻孔径
规格	精度等级
规格	G4-G6	G7-G8	G9
No. 2-56UNC	1.94	—	—
No. 3-8	2.23	—	—
No. 4-40	2.50	—	—
No. 5-40	2.83	—	—
No. 6-32	3.07	—	—
No. 8-32	3.73	3.770	—
No. 10-24	4.24	4.300	—
No. 12-24	4.90	4.960	—
1/4-20	—	5.720	—
5/6-18	—	7.240	—
3/8-16	—	8.740	8.810
7/16-14	—	10.200	10.300
1/2-13	—	11.270	11.820
No. 2-64UNF	1.97	—	—
No. 3-56	2.27	—	—
No. 4-56	2.56	—	—
No. 5-44	2.86	—	—
No. 6-40	3.16	—	—
No. 8-36	3.78	—	—
No. 10-32	4.39	4.430	—
No. 12-28	4.99	5.040	—
1/4-28	5.85	5.900	—
5/16-24	7.36	7.410	—
3/8-24	—	9.000	—
7/16-20	—	10.480	10.540
36942.00	—	12.070	12.130