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统一螺纹内六角平端紧定螺钉 Table 6A BS 2470 - 1973

选择规格尺寸点击↓

10#

1/4

5/16

3/8

7/16

1/2

5/8

3/4

7/8

尺寸单位: 英寸(inch)

英标BS 2470 - 1973 BS2470 2470BS 统一螺纹内六角平端紧定螺钉 Table 6A

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单重计算公差美制螺纹极限尺寸米/英制螺纹对照螺纹直径与受力截面积最小破坏扭矩牌号等级

螺纹规格
d

10#

PP	UNC
PP	UNF
s	公称
t	最小值
d_p	最大值
d_p	最小值

-	64	56	48	40	40	32	32	24
80	72	64	56	48	44	40	36	32
0.028	0.035	0.035	0.050	0.050	1/16	1/16	5/64	3/32
0.022	0.028	0.028	0.040	0.040	0.050	0.050	0.062	0.075
0.033	0.040	0.047	0.054	0.061	0.067	0.074	0.087	0.102
0.027	0.033	0.039	0.045	0.051	0.057	0.064	0.076	0.088

螺纹规格
d

1/4

5/16

3/8

7/16

1/2

5/8

3/4

7/8

PP	UNC
PP	UNF
s	公称
t	最小值
d_p	最大值
d_p	最小值

20	18	16	14	13	11	10	9	8
28	24	24	20	20	18	16	14	12
1/8	5/32	3/16	7/32	1/4	5/16	3/8	1/2	9/16
0.100	0.125	0.150	0.175	0.200	0.250	0.300	0.400	0.450
0.132	0.172	0.212	0.252	0.291	0.371	0.450	0.530	0.609
0.118	0.156	0.194	0.232	0.27	0.347	0.425	0.502	0.579

引用参考

GB /T 1172 - 1999

黑色金属硬度及强度换算值

GB /T 5267.1 - 2002

镀锌、镀镍、镀镉、复合镀等层镀层盐雾腐蚀的防护性能

GB /T 193 - 2003

普通螺纹（一般用途米制螺纹）- 直径与螺距系列 (ISO 261: 1998, MOD)

GB /T 3106 - 2016

紧固件 - 螺栓、螺钉和螺柱 - 公称长度和螺纹长度 (ISO 888:2012, MOD)

GB /T 3 - 1997

普通螺纹收尾、肩距、退刀槽和倒角 (ISO 3508:1976 / ISO 4755:1983)

GB /T 5779.1 - 2000

紧固件表面缺陷 - 螺栓、螺钉和螺柱 - 一般要求

GB /T 5779.3 - 2000

紧固件表面缺陷 - 螺栓、螺钉和螺柱 - 特殊要求

注：技术数据仅供参考，请以官方原件为准！

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