Machine Screw Size Chart

M/M MACHINE SCREW 2A (60°)
M/M 米厘粗牙機械螺絲 2A (60°)規格
規格	牙距	外徑（D）		輾造徑
規格	P	MAX	MIN	MAX	MIN
M1	0.25	0.980	0.838	0.693	0.729
M1.1	0.25	1.098	0.938	0.793	0.829
M1.2	0.25	1.180	1.140	1.040	1.010
M1.4	0.3	1.380	1.340	1.200	1.160
M1.7	0.35	1.680	1.610	1.460	1.420
M2	0.4	1.980	1.890	1.720	1.690
M2.3	0.4	2.280	2.190	2.020	1.990
M2.5	0.45	2.480	2.380	2.180	2.150
M2.6	0.45	2.580	2.480	2.280	2.250
M3	0.5	2.980	2.880	2.640	2.610
M3.5	0.6	3.470	3.360	3.060	3.030
M4	0.7	3.980	3.840	3.490	3.150
M4.5	0.75	4.470	4.340	3.960	3.920
M5	0.8	4.980	4.830	4.430	4.380
M6	1.0	5.970	5.820	5.300	5.250
M7	1.0	6.970	6.820	6.300	6.250
M8	1.25	7.960	7.790	7.120	7.070
M9	1.25	8.960	8.790	7.120	8.070
M10	1.5	9.960	9.770	8.970	8.910
M11	1.5	10.970	10.730	9.970	9.910
M12	1.75	11.950	11.760	10.790	10.730
M14	2.0	13.950	13.740	12.630	12.560
M16	2.0	15.950	15.740	14.630	14.560
M18	2.5	17.950	17.710	16.310	16.230
M20	2.5	19.950	19.710	18.310	18.230
M22	2.5	21.950	21.710	20.310	20.230
M24	3.0	23.940	23.680	21.980	21.900
M27	3.0	26.940	26.680	24.980	24.890
M30	3.5	29.940	29.660	27.660	27.560
M33	3.5	32.940	32.660	30.650	30.560
M36	4.0	35.930	35.630	33.330	33.230

M/M MACHINE SCREW 2A (60°)
M/M 米厘細牙機械螺絲 2A (60°)規格
規格	牙距	外徑（D）		輾造徑
規格	P	MAX	MIN	MAX	MIN
M1.4	0.2	1.400	1.344	1.270	1.220
M1.6	0.2	1.583	1.527	1.450	1.400
M1.8	0.2	1.783	1.727	1.650	1.600
M2.0	0.25	1.982	1.915	1.820	1.760
M2.2	0.25	2.182	2.115	2.020	1.960
M2.5	0.35	2.481	2.396	2.250	2.190
M3.0	0.35	2.981	2.896	2.750	2.680
M3.5	0.35	3.481	3.396	3.250	3.180
M4	0.5	3.980	3.874	3.610	3.570
M4.5	0.5	4.480	4.374	4.110	4.070
M5	0.5	4.980	4.874	4.610	4.570
M6	0.75	5.978	5.838	5.450	5.410
M7	0.75	6.978	6.838	6.450	6.410
M8	1.0	7.974	7.794	7.290	7.240
M9	1.0	8.974	8.794	8.290	8.240
M10	1.25	9.972	9.760	9.120	9.070
M10	1.0	9.974	9.794	9.280	9.230
M12	1.25	11.972	11.760	11.120	11.070
M12	1.5	11.968	11.732	10.950	10.890
M14	1.5	13.968	13.732	12.950	12.890
M16	1.5	15.968	15.732	14.950	14.890
M18	2.0	17.962	17.682	16.620	16.540
M18	1.5	17.968	17.732	16.930	16.860
M20	2.0	19.962	19.682	18.620	18.540
M20	1.5	19.968	19.732	18.920	18.850
M22	1.5	21.968	21.732	20.920	20.850
M24	1.5	23.968	23.732	22.920	22.850
M26	1.5	25.968	25.732	24.930	24.850
M27	1.5	26.968	26.732	25.930	25.850
M28	1.5	27.968	27.732	26.930	26.850
M30	1.5	29.968	29.732	28.930	28.850
M32	1.5	31.968	31.732	30.930	30.850
M33	1.5	32.968	32.732	31.930	31.850

BSW MACHINE SCREW 2A Q (55º)
BSW 機械螺絲 2A (55º) 韋氏牙規格
規格	牙數T	外徑（D）		輾造徑
規格	牙數T	MAX	MIN	MAX	MIN
1/16	60	1.560	1.470	1.290	1.270
3/32	48	2.361	2.155	2.010	1.990
1/8	40	3.155	3.045	2.720	2.700
5/32	32	3.945	3.795	3.400	3.380
3/16	24	4.742	4.592	4.030	4.000
1/4	20	6.330	6.160	5.480	5.450
5/16	18	7.910	7.720	6.970	6.940
3/8	16	9.500	9.310	8.440	8.400
7/16	14	11.082	10.892	9.880	9.840
1/2	12	12.670	12.460	11.270	11.220
9/16	12	14.258	14.047	12.860	12.810
5/8	11	15.848	15.605	14.330	14.270
3/4	10	19.020	18.780	17.340	17.280
7/8	9	22.195	21.935	20.320	20.280
1"	8	25.370	25.110	23.270	23.230
1 ⅛”	7	28.575	26.251	23.930	24.750
1 ¼”	7	31.750	29.426	27.110	27.250
1 ½”	6	38.100	35.390	32.680	33.500

BA MACHINE SCREW 2A Q (47.5º)
BA 機械螺絲 2A Q (47.5º) 規格
規格	牙距 P	外徑（D）		輾造徑
規格	牙距 P	MAX	MIN	MAX	MIN
0 BA	1.0	5.970	5.820	5.320	5.220
1 BA	0.90	5.270	5.120	4.685	4.580
2 BA	0.81	4.676	4.526	4.150	4.016
3 BA	0.73	4.078	3.938	3.604	3.479
4 BA	0.66	3.570	3.460	3.141	3.045
5 BA	0.59	3.180	3.050	2.797	2.779
6 BA	0.53	2.780	2.660	2.436	2.327
7 BA	0.48	2.470	2.380	2.200	2.180
8 BA	0.43	1.810	1.720	1.531	1.450

SM 機械螺絲 2A (60º)
SM　針　車　用　規　格
規格	牙數	外徑（D）		輾造徑
規格	T	MAX	MIN	MAX	MIN
5/64	64	1.964	1.867	1.690	1.680
3/32	56	2.361	2.267	2.060	2.040
1/8	48	3.155	3.041	2.800	2.780
1/8	44	3.155	3.041	2.770	2.750
1/8	40	3.155	3.041	2.730	2.710
9/64	40	3.542	3.432	3.130	3.100
11/64	40	4.336	4.226	3.920	3.890
11/64	32	4.336	4.226	3.810	3.790
3/16	40	4.732	4.602	4.310	4.280
3/16	32	4.732	4.602	4.220	4.190
3/16	28	4.732	4.602	4.140	4.110
3/16	24	4.732	4.602	4.040	4.010
13/64	32	5.126	4.976	4.600	4.570
7/32	32	5.526	5.376	5.010	4.980
15/64	28	5.923	5.773	5.320	5.290
1/4	40	6.330	6.160	5.900	5.870
1/4	28	6.330	6.160	5.720	5.690
1/4	24	6.330	6.160	5.620	5.590
9/32	28	7.114	6.964	6.510	6.480
9/32	20	7.114	6.964	6.280	6.250
5/16	24	7.910	7.727	7.210	7.180
5/16	18	7.910	7.727	6.970	6.940

UNC MACHINE SCREW 2A Q (60º)
UNC 機械粗牙螺絲 2A Q (60º) 規格
規格	牙數T	外徑（D）		輾造徑
規格	牙數T	MAX	MIN	MAX	MIN
#1	64	1.838	1.743	1.570	1.540
#2	56	2.169	2.066	1.860	1.840
#3	48	2.496	2.383	2.140	2.110
#4	40	2.824	2.695	2.400	2.360
#5	40	3.154	3.026	2.720	2.690
#6	32	3.484	3.333	2.950	2.910
#8	32	4.142	3.991	3.600	3.570
#10	24	4.800	4.618	4.090	4.050
#12	24	5.461	5.279	4.750	4.700
1/4	20	6.322	6.117	5.500	5.450
5/16	18	7.907	7.687	6.980	6.930
3/8	16	9.491	9.254	8.450	8.400
7/16	14	11.076	10.816	9.890	9.830
1/2	13	12.661	12.386	11.390	11.320
9/16	12	14.246	13.958	12.870	12.800
5/8	11	15.834	15.528	14.330	14.260
3/4	10	19.004	18.677	17.340	17.270
7/8	9	22.176	21.824	20.340	20.260
1"	8	25.349	24.969	23.280	23.200
1⅛	7	28.519	28.103	26.160	26.070
1¼	7	31.694	31.278	29.330	29.240
1⅜	7	34.864	34.002	32.120	32.020
1½	6	38.039	37.577	35.290	35.080
1¾	5	44.381	43.861	4108.000	40.860

UNF MACHINE SCREW 2A Q (60º)
UNF機械細牙螺絲2A Q (60º)
規格	T牙數	外徑（D）		輾造徑
規格	T牙數	MAX	MIN	MAX	MIN
#0	80	1.511	1.431	1.310	1.260
#1	72	1.838	1.751	1.610	1.560
#2	64	2.169	2.073	1.910	1.890
#3	56	2.496	2.393	2.200	2.170
#4	48	2.827	2.713	2.470	2.440
#5	44	3.157	3.036	2.760	2.730
#6	40	3.484	3.356	3.050	3.020
#8	36	4.145	4.006	3.660	3.630
#10	32	4.803	4.651	4.260	4.230
#12	28	5.461	5.296	4.850	4.810
1/4	28	6.324	6.160	5.720	5.680
5/16	24	7.909	7.727	7.200	7.160
3/8	24	9.497	9.315	8.760	8.740
7/16	20	11.079	10.874	10.230	10.180
1/2	20	12.666	12.462	11.820	11.760
9/16	18	14.251	14.031	13.310	13.250
5/8	18	15.839	15.619	14.890	14.830
3/4	16	19.011	18.774	17.950	17.890
7/8	14	22.184	21.923	20.980	20.910
1"	12	25.254	25.065	23.950	23.870
1⅛	12	28.529	28.240	27.120	27.050
1¼	12	31.704	31.415	30.290	30.210
1⅜	12	34.876	34.588	33.460	33.380
1½	12	38.051	37.763	36.630	36.550

Technical Info