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內六角凹端緊定螺釘 [Type C] (ASTM F912 / F880) ASME B 18.3 (T14 CUP-C) - 2012

選擇規格尺寸點擊↓

10#

1/4

5/16

3/8

7/16

1/2

5/8

3/4

7/8

1-1/8

1-1/4

1-3/8

1-1/2

1-3/4

ASME B 18.3 (T14 CUP-C) - 2012 內六角凹端緊定螺釘 [Type C] (ASTM F912 / F880)

尺寸單位: inch

美標ASME B18.3 (T14 CUP-C) - 2012 ASME18.3 內六角凹端緊定螺釘 [Type C] (ASTM F912 / F880)

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公差美制螺紋極限尺寸米/英制螺紋對照螺紋直徑與受力截面積最小破壞扭矩牌號等級

螺紋尺寸
d

10#

1/4

5/16

3/8

d	螺紋直徑
PP	粗牙/UNC
	細牙/UNF
	超細牙/UNEF
s	公稱
t ^③	最小值
d_z	最大值
d_z	最小值
L₀ ^②

0.0600	0.0730	0.0860	0.0990	0.1120	0.1250	0.1380	0.1640	0.1900	0.2500	0.3125	0.3750
-	64.0	56.0	48.0	40.0	40.0	32.0	32.0	24.0	20.0	18.0	16.0
80.0	72.0	64.0	56.0	48.0	44.0	40.0	36.0	32.0	28.0	24.0	24.0
-	-	-	-	-	-	-	-	-	32.0	32.0	32.0
0.028	0.035	0.035	0.050	0.050	0.062	0.062	0.078	0.094	0.125	0.156	0.188
0.050	0.060	0.060	0.070	0.070	0.080	0.080	0.090	0.100	0.125	0.156	0.188
0.033	0.040	0.047	0.054	0.061	0.067	0.074	0.087	0.102	0.132	0.172	0.212
0.027	0.033	0.039	0.045	0.051	0.057	0.064	0.076	0.088	0.118	0.156	0.194
0.13	0.13	0.13	0.19	0.19	0.19	0.19	0.19	0.19	0.25	0.31	0.38

螺紋尺寸
d

7/16

1/2

5/8

3/4

7/8

1-1/8

1-1/4

1-3/8

1-1/2

1-3/4

d	螺紋直徑
PP	粗牙/UNC
	細牙/UNF
	超細牙/UNEF
s	公稱
t ^③	最小值
d_z	最大值
d_z	最小值
L₀ ^②

0.4375	0.5000	0.6250	0.7500	0.8750	1.0000	1.1250	1.2500	1.3750	1.5000	1.7500	2.0000
14.0	13.0	11.0	10.0	9.0	8.0	7.0	7.0	6.0	6.0	5.0	4.5
20.0	20.0	18.0	16.0	14.0	12.0	12.0	12.0	12.0	12.0	-	-
28.0	28.0	24.0	20.0	20.0	20.0	18.0	18.0	18.0	18.0	-	-
0.219	0.250	0.312	0.375	0.500	0.562	0.562	0.625	0.625	0.750	1.000	1.000
0.219	0.250	0.312	0.375	0.500	0.562	0.562	0.625	0.625	0.750	1.000	1.000
0.252	0.291	0.371	0.450	0.530	0.609	0.689	0.767	0.848	0.926	1.086	1.244
0.232	0.270	0.347	0.425	0.502	0.579	0.655	0.733	0.808	0.886	1.039	1.193
0.44	0.5	0.63	0.75	0.88	1	1.25	1.25	1.5	1.5	1.75	2

①,材料
a、合金鋼應符合ASTM F912
b、不銹鋼應符合ASTM F880
②,當螺釘長度L小于等于表中L0時為短螺釘，若L大于L0則為長螺釘。
③,表中的內凹槽插入深度t適用于公稱長度L大于等于表中L0的螺釘，其他情況詳見標準原件。
④,表中規定的短螺釘在進行緊固時，往往發生因內板擰插入深度不夠或螺紋長度不甚理想，而出現的扳擰或螺紋配合上的故障。所以特別提示生產者和用戶，在可能的情況下，都應盡可能采用長度大于等于表中L0的螺釘。

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、鍍鎘、復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)

GB /T 3106 - 2016

緊固件 - 螺栓、螺釘和螺柱 - 公稱長度和螺紋長度 (ISO 888:2012, MOD)

GB /T 3 - 1997

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

GB /T 5779.1 - 2000

緊固件表面缺陷 - 螺栓、螺釘和螺柱 - 一般要求

GB /T 5779.3 - 2000

緊固件表面缺陷 - 螺栓、螺釘和螺柱 - 特殊要求

注：技術數據僅供參考，請以官方原件為準！

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18	[英標] BS 2470 - 1973	統一螺紋內六角凹端緊定螺釘 Table 6A Hexagon Socket Set Screws with Cup Point - Unified Thread
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內六角凹端緊定螺釘 [Type C] (ASTM F912 / F880) ASME B 18.3 (T14 CUP-C) - 2012

引用參考