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米制和美制焊接六角螺母 [Table 4] BS 7670-1 - 1993

選擇規格尺寸點擊↓

M10

7/16 20 UNF-2B

M12

尺寸單位: 毫米(mm)/英寸(inch)

英标BS 7670-1 - 1993 BS7670-1 7670-1BS 米制和美制焊接六角螺母 [Table 4]

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公差公制螺紋極限尺寸米/英制螺紋對照

螺紋規格
D

M10

7/16
20 UNF-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
d₁	最大值
d₁	最小值
e	最小值
h₁	最大值
h₁	最小值
h₂	最大值
h₂	最大值
m	最大值
m	最小值
s	最大值
s	最小值

0.5	0.7	0.8	1	1.25	1.5	-	1.75
1	1	1	1.12	1.25	1.55	1.55	1.55
0.6	0.6	0.6	0.68	0.75	0.95	0.95	0.95
4.68	6.18	7.22	8.22	10.77	12.77	13.77	15.07
4.5	6	7	8	10.5	12.5	13.5	14.8
3.15	4.2	5.25	6.3	8.4	10.5	11.7	12.6
4.47	5.97	6.96	7.96	10.45	12.45	13.45	14.75
4.395	5.895	6.87	7.87	10.34	12.34	13.34	14.64
8.15	9.83	10.95	12.02	15.38	18.74	20.91	20.91
0.55	0.65	0.7	0.75	0.9	1.15	1.4	1.4
0.45	0.55	0.6	0.6	0.75	1	1.2	1.2
0.25	0.35	0.4	0.4	0.5	0.65	0.8	0.8
0.15	0.25	0.3	0.3	0.35	0.5	0.6	0.6
3	3.5	4	5	6.5	8	10	10
2.75	3.2	3.7	4.7	6.14	7.64	9.64	9.64
7.5	9	10	11	14	17	19	19
7.28	8.78	9.78	10.73	13.73	16.73	18.67	18.67

技術條件和引用标準

材料
螺紋公差(ISO 公制)
螺紋公差(Unified)
機械性能 ^①
允許偏差
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.

引用參考

GB /T 1172 - 1999

黑色金屬硬度及強度換算值

GB /T 5267.1 - 2002

鍍鋅、鍍鎳、鍍镉、複合鍍等層鍍層鹽霧腐蝕的防護性能

GB /T 193 - 2003

普通螺紋（一般用途米制螺紋）- 直徑與螺距系列 (ISO 261: 1998, MOD)

注：技術數據僅供參考，請以官方原件為準！

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