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C级高强度钢结构栓接用六角头螺栓（螺纹长度根据ISO 888） 8.8和10.9级 ISO 7411 - 1984

选择规格尺寸点击↓

M12

M16

M20

(M22)

M24

(M27)

M30

M36

括号内尺寸为非优选

ISO 7411 - 1984 C级高强度钢结构栓接用六角头螺栓（螺纹长度根据ISO 888） 8.8和10.9级

尺寸单位: mm

国际ISO 7411 - 1984 ISO7411 7411ISO C级高强度钢结构栓接用六角头螺栓（螺纹长度根据ISO 888） 8.8和10.9级

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单重计算公差公制螺纹极限尺寸米/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毛坯直径

螺纹规格
d

M12

M16

M20

(M22)

M24

(M27)

M30

M36

P	螺距
c	最大值
c	最小值
d_a	最大值
d_s	最大值
d_s	最小值
d_w	最小值
e	最小值
k	公称
	最大值
	最小值
k₁	最小值
r	最小值
s	最大值
s	最小值

1.75	2.0	2.5	2.5	3	3	3.5	4
0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8
0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4
14.7	18.7	23.24	25.24	27.64	31.24	34.24	41
12.70	16.70	20.84	22.84	24.84	27.84	30.84	37.00
11.30	15.30	19.16	21.16	23.16	26.16	29.16	35.00
19.2	24.9	31.4	33.3	38	42.8	46.5	55.9
22.78	29.56	37.29	39.55	45.2	50.85	55.37	66.44
7.5	10	12.5	14	15	17	18.7	22.5
7.95	10.75	13.40	14.90	15.90	17.90	19.75	23.55
7.05	9.25	11.60	13.10	14.10	16.10	17.65	21.45
4.9	6.5	8.1	9.2	9.9	11.3	12.4	15
0.6	0.6	0.8	0.8	1	1.2	1.2	1.5
21	27	34	36	41	46	50	60
20.16	26.16	33	35	40	45	49	58.8

螺纹长度b

①,dw_最大值= S_实际值

工艺相关

金属覆盖层钢铁制件热浸镀锌层技术要求及试验方法

紧固件公差 Part1:螺栓、螺钉、螺柱和螺母产品等级 A、B和 C级

ISO 4775

高强度钢结构栓接用 - B级 - 大六角螺母（大对边）- 8、10级

技术条件和引用标准

材料
螺纹	公差
	标准
机械性能	等级
	标准
表面处理	常规
	可选^③
公差	产品等级
	标准
Acceptability
Associated nuts
Associated plain hole washers
Associated chamfered hole washers
备注

钢
6 g^①
ISO 261、ISO 965
8.8	10.9
ISO 898/1
Black oxide^②
Zinc electroplated^④ Cadmium electroplated^④ Hot-dip galvanized to ISO 1461	Zinc electroplated^⑤ Cadmium electroplated^⑤ Hot-dip galvanized to ISO 1461^⑥
C except：c, d_w(0.95 s_min) and r. Tolerance for lengths over 180 mm : ± 4.0 mm.
ISO 4759/1
For acceptance procedure, see ISO 3269.
ISO 4775
ISO 7415
ISO 7416
① The tolerance class specified applies before electroplating or hot-dip galvanizing. Hot-dip galvanized bolts may also be supplied by agreement between the user and the manufacturer, having screw threads which after galvanizing shall be accepted by a GO gauge of the basic thread size, i.e. the bolt threads are undersized before galvanizing to tolerance class 6az to accommodate the zinc coating. These bolts are designated and marked 8.8S U or 10.9S U ( see also clauses 6 and 7 ). Tolerance class 6az is in the course of preparation, but in the interim the screw thread dimensions are given in annex A. ② Black oxide means the normal finish resulting from manufacture with a light coating of oil. ③ Other coatings may be negotiated between the purchaser and the manufacturer provided they do not impair the mechanical properties. ④ This will be the subject of a future International Standard. ⑤ Precautions to avoid hydrogen embrittlement may be necessary. Reference should be made to the future International Standard dealing with electroplating of threaded components. ⑥ Precautions to avoid hydrogen embrittlement may be necessary.

引用参考

GB /T 1172

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 12603 - 2005

金属热处理工艺分类及代号

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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材质：碳钢；表面处理：发黑、镀锌、热镀锌；等级：10.9级；公称直径范围：根据客户需求；公称长度范围：根据客户需求

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33	[英标] BS 4395-1 - 1969	米制高强度大六角头螺栓 Table 5 Metric High Strength Large Hexagon Head Bolts
34	[英标] BS 1769 - 1951	大六角头锻造螺栓(统一螺纹) Unified hexagon head forged bolts
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