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米制和美制焊接方螺母 [Table 3] BS 7670-1 - 1993

选择规格尺寸点击↓

M10

7/16 20UNF-2B

M12

尺寸单位: 毫米(mm)/英寸(inch)

英标BS 7670-1 - 1993 BS7670-1 7670-1BS 米制和美制焊接方螺母 [Table 3]

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公差公制螺纹极限尺寸米/英制螺纹对照

螺纹规格
d

M10

7/16
20UNF-2B

M12

P	螺距
b	最大值
b	最小值
d₂	最大值
d₂	最小值
d₃	最大值
e	最小值
h	最大值
h	最小值
m	最大值
m	最小值
s	最大值
s	最小值

0.7	0.8	1	1.25	1.5	-	1.75
0.95	1.15	1.35	1.65	2	2.2	2.2
0.65	0.85	1.05	1.35	1.6	1.8	1.8
5.18	6.18	7.72	10.22	12.77	13.77	13.77
5	6	7.5	10	12.5	13.5	13.5
4.2	5.25	6.3	8.4	10.5	11.7	12.6
9	12	13	18	22	25	25
0.7	0.9	0.9	1.1	1.3	1.5	1.5
0.5	0.7	0.7	0.9	1.1	1.3	1.3
3.5	4.2	5	6.5	8	9	9.5
3.2	3.9	4.7	6.14	7.64	8.64	9.14
7	9	10	14	17	19	19
6.64	8.64	9.64	13.57	16.57	18.48	18.48

技术条件和引用标准

材料
螺纹公差(ISO 公制)
螺纹公差(Unified)
机械性能 ^①
允许偏差
Finish
Acceptability
-

Steel with a carbon content not greater than 0.23 %.

Conforming to class 6H of BS 3643-1:1981 and BS 3643-2 :1981.

Conforming to class 2B of BS 1580-1:1962 & BS 1580-2 :1962.

Conforming to material property class 4, 6 or 8 of BS EN 20898-2:1992 ^②

Conforming to product grade A of BS 6322-1:1982.

As processed, with a lubricant, but free from scale and excessive oxide, as rolled, unless otherwise agreed between the purchaser and supplier^③

In accordance with BS 6587:1985

① Both before and after welding.
② The material property class shall be marked on the nuts by the indented method only, and shall be applied to the applied to the side or upper (unwelded ) face
only in such a way that it does not interfere with the quality of the surface.
③ Alternative surface finishes (e.g. electroplating) may be applied, if agreed between the purchaser and supplier. Some surface finishes are unsuitable for welding.

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)

注：技术数据仅供参考，请以官方原件为准！

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