美制螺丝规格,美制螺丝规格表-不锈钢牙板-华人螺丝网

美制外螺纹（2A）常用螺丝规格极限尺寸表（粗牙）

公称尺寸和每英寸牙数	螺纹系列代号	大径极限	中径极限	小径max	螺胚直径
最小	最大	最小	最大	最小	最大
8-32	UNC	0.1571	0.1631	0.1399	0.1428	0.1248	3.58	3.61
(0.164-32)	3.9903	4.1427	3.5535	3.6271	3.1699
10-24	0.1818	0.1890	0.1586	0.1619	0.1379	4.07	4.10
(0.190-24)	4.6177	4.8006	4.0284	4.1123	3.5027
12-24	0.2078	0.2150	0.1845	0.1879	0.1639	4.72	4.75
(0.216-24)	5.2781	5.4610	4.6863	4.7727	4.1631
1/4-20	0.2408	0.2489	0.2127	0.2164	0.1876	5.45	5.48
(0.250-20)	6.1163	6.3221	5.4026	5.4966	4.7650
5/16-18	0.3026	0.3113	0.2712	0.2752	0.2431	6.94	6.98
(0.3175-18)	7.6860	7.9070	6.8885	6.9901	6.1747
3/8-16	0.3643	0.3737	0.3287	0.3331	0.2970	8.40	8.44
(0.375-16)	9.2532	9.4920	8.3490	8.4607	7.5438
7/16-14	0.4258	0.4361	0.3850	0.3897	0.3485	9.83	9.87
(0.4375-14)	10.8153	11.0769	9.7790	9.8984	8.8519
1/2-13	0.4876	0.4985	0.4435	0.4485	0.4041	11.34	11.38
(0.50-13)	12.3850	12.6619	11.2649	11.3919	10.2641
9/16-12	0.5495	0.5609	0.5016	0.5068	0.4587	12.80	12.84
(0.5625-12)	13.9573	14.2469	12.7406	12.8727	11.6510
5/8-11	0.6113	0.6234	0.5589	0.5644	0.5119	14.27	14.32
(0.625-11)	15.5270	15.8344	14.1961	14.3358	13.0023
3/4-10	0.7353	0.7482	0.6773	0.6832	0.6255	17.28	17.33
(0.750-10)	18.6766	19.0043	17.2034	17.3533	15.8877
7/8-9	0.8592	0.8731	0.7946	0.8009	0.7368	20.27	20.32
(0.875-9)	21.8237	22.1767	20.1828	20.3429	18.7147
1"-8	0.9830	0.9980	0.9100	0.9168	0.8446	23.22	23.27
(1.000-8)	24.9682	25.3492	23.1140	23.2867	21.4528

美制外螺纹（2A）常用螺丝规格极限尺寸表（细牙）

公称尺寸和每英寸牙数	螺纹系列代号	大径极限	中径极限	小径max	螺胚直径
最小	最大	最小	最大	最小	最大
8-36	UNF	0.1577	0.1632	0.1424	0.1452	0.1291	3.65	3.67
(0.164-36)	4.0056	4.1453	3.6170	3.6881	3.2791
10-32	0.1831	0.1891	0.1658	0.1688	0.1508	4.24	4.27
(0.190-32)	4.6507	4.8031	4.2113	4.2875	3.8303
12-28	0.2085	0.2150	0.1886	0.1918	0.1712	4.82	4.85
(0.216-28)	5.2959	5.4610	4.7904	4.8717	4.3485
1/4-28	0.2425	0.2490	0.2225	0.2258	0.2052	5.69	5.71
(0.250-28)	6.1595	6.3246	5.6515	5.7353	5.2121
5/16-24	0.3042	0.3114	0.2806	0.2843	0.2603	7.17	7.20
(0.3175-24)	7.7267	7.9096	7.1272	7.2212	6.6116
3/8-24	0.3667	0.3739	0.3430	0.3468	0.3228	8.75	8.78
(0.375-24)	9.3142	9.4971	8.7122	8.8087	8.1991
7/16-20	0.4281	0.4362	0.3995	0.4037	0.3749	10.19	10.23
(0.4375-20)	10.8737	11.0795	10.1473	10.2540	9.5225
1/2-20	0.4906	0.4987	0.4619	0.4662	0.4374	11.78	11.82
(0.50-20)	12.4612	12.6670	11.7323	11.8415	11.1100
9/16-18	0.5524	0.5611	0.5205	0.5250	0.4929	13.27	13.31
(0.5625-18)	14.0310	14.2519	13.2207	13.3350	12.5197
5/8-18	0.6149	0.6236	0.5828	0.5875	0.5554	14.85	14.89
(0.625-18)	15.6185	15.8394	14.8031	14.9225	14.1072
3/4-16	0.7391	0.7485	0.7029	0.7079	0.6718	17.91	17.95
(0.750-16)	18.7731	19.0119	17.8537	17.9807	17.0637
7/8-14	0.8631	0.8734	0.8216	0.8270	0.7858	20.93	20.97
(0.875-14)	21.9227	22.1844	20.8686	21.0058	19.9593
1"-12	0.9868	0.9982	0.9382	0.9441	0.8960	23.90	23.95
(1.000-12)	25.0647	25.3543	23.8303	23.9801	22.7584

美制内螺纹（2B）常用螺丝规格极限尺寸表（粗牙）

公称尺寸和每英寸牙数	螺纹系列代号	小径极限	中径极限	大径min	底孔直径
最小	最大	最小	最大	最小	最大
8-32	UNC	0.1300	0.1390	0.1437	0.1475	0.1640	3.40	3.50
(0.164-32)	3.3020	3.5306	3.6500	3.7465	4.1656
10-24	0.1450	0.1560	0.1629	0.1672	0.1900	3.75	3.90
(0.190-24)	3.6830	3.9624	4.1377	4.2469	4.8260
12-24	0.1710	0.1810	0.1889	0.1933	0.2160	4.40	4.55
(0.216-24)	4.3434	4.5974	4.7981	4.9098	5.4864
1/4-20	0.1960	0.2070	0.2175	0.2224	0.2500	5.05	5.20
(0.250-20)	4.9784	5.2578	5.5245	5.6490	6.3500
5/16-18	0.2520	0.2650	0.2764	0.2817	0.3125	6.45	6.60
(0.3175-18)	6.4008	6.7310	7.0206	7.1552	7.9375
3/8-16	0.3070	0.3210	0.3344	0.3401	0.3750	7.85	8.00
(0.375-16)	7.7978	8.1534	8.4938	8.6385	9.5250
7/16-14	0.3600	0.3760	0.3911	0.3972	0.4375	9.20	9.40
(0.4375-14)	9.1440	9.5504	9.9339	10.0889	11.1125
1/2-13	0.4170	0.4340	0.4500	0.4565	0.5000	10.65	10.90
(0.50-13)	10.5918	11.0236	11.4300	11.5951	12.7000
9/16-12	0.4720	0.4900	0.5084	0.5152	0.5625	12.05	12.30
(0.5625-12)	11.9888	12.4460	12.9134	13.0861	14.2875
5/8-11	0.5270	0.5460	0.5660	0.5732	0.6250	13.45	13.70
(0.625-11)	13.3858	13.8684	14.3764	14.5593	15.8750
3/4-10	0.6420	0.6630	0.6850	0.6927	0.7500	16.40	16.70
(0.750-10)	16.3068	16.8402	17.3990	17.5946	19.0500
7/8-9	0.7550	0.7780	0.8028	0.8110	0.8750	19.30	19.60
(0.875-9)	19.1770	19.7612	20.3911	20.5994	22.2250
1"-8	0.8650	0.8900	0.9188	0.9276	1.0000	22.10	22.40
(1.000-8)	21.9710	22.6060	23.3375	23.5610	25.4000

美制内螺纹（2B）常用螺丝规格极限尺寸表（细牙）

公称尺寸和每英寸牙数	螺纹系列代号	小径极限	中径极限	大径min	底孔直径
最小	最大	最小	最大	最小	最大
8-36	UNF	0.1340	0.1420	0.1460	0.1496	0.1640	3.45	3.67
(0.164-36)	3.4036	3.6068	3.7084	3.7998	4.1656
10-32	0.1560	0.1640	0.1697	0.1736	0.1900	4.00	4.27
(0.190-32)	3.9624	4.1656	4.3104	4.4094	4.8260
12-28	0.1770	0.1860	0.1928	0.1970	0.2160	4.55	4.85
(0.216-28)	4.4958	4.7244	4.8971	5.0038	5.4864
1/4-28	0.2110	0.2200	0.2268	0.2311	0.2500	5.40	5.71
(0.250-28)	5.3594	5.5880	5.7607	5.8699	6.3500
5/16-24	0.2670	0.2770	0.2854	0.2902	0.3125	6.85	7.20
(0.3175-24)	6.7818	7.0358	7.2492	7.3711	7.9375
3/8-24	0.3300	0.3400	0.3479	0.3528	0.3750	8.45	8.78
(0.375-24)	8.3820	8.6360	8.8367	8.9611	9.5250
7/16-20	0.3830	0.3950	0.4050	0.4104	0.4375	9.85	10.23
(0.4375-20)	9.7282	10.0330	10.2870	10.4242	11.1125
1/2-20	0.4460	0.4570	0.4675	0.4731	0.5000	11.40	11.82
(0.50-20)	11.3284	11.6078	11.8745	12.0167	12.7000
9/16-18	0.5020	0.5150	0.5264	0.5323	0.5625	12.85	13.31
(0.5625-18)	12.7508	13.0810	13.3706	13.5204	14.2875
5/8-18	0.5650	0.5780	0.5889	0.5949	0.6250	14.45	14.89
(0.625-18)	14.3510	14.6812	14.9581	15.1105	15.8750
3/4-16	0.6820	0.6960	0.7094	0.7159	0.7500	17.40	17.95
(0.750-16)	17.3228	17.6784	18.0188	18.1839	19.0500
7/8-14	0.7980	0.8140	0.8286	0.8356	0.8750	20.35	20.97
(0.875-14)	20.2692	20.6756	21.0464	21.2242	22.2250
1"-12	0.9100	0.9280	0.9459	0.9535	1.0000	23.90	23.95
(1.000-12)	23.1140	23.5712	24.0259	24.2189	25.4000
B: 美规螺丝. a.一般以番号标示, 如#2-56, #4-40, #6-32, #8-32, #10-24…etc. b.或以英制外径表示,如0.086-56, 0.112-40 , 0.138-32 , 0.164-32 , 0.190-24…etc. Ex: 632 – 8 – P P B: Finish Code: 外观处理规格 Head Code: 头部外型 Drive Code: 头部剖沟,特征型号 Length Code: 螺丝长度 Thread Code: 螺丝型号 B-1: Thread Code: 螺丝型号一般常用规格如下: a. #2-56 (0.086-56): 2 番56 牙 b #4-40 (0.112-40) : 4 番40 牙 c. #6-32 (0.138-32) : 6 番32 牙 d. #8-32 (0.164-32) : 8 番32 牙 e. #10-24 (0.190-24): 10 番24 牙 *牙为每吋之牙数.* B-2: Length Code: 螺丝长度美规螺丝长度须经换算, 才是公制mm 尺寸.换算公式: (Length Code / 32) x 25.40 = 公制长度mm B-3, B-4,B-5 : 标示方式与公制相同.

美制螺丝规格,美制螺丝规格表