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開槽沉頭螺釘（短的）Table 6 BS 1981 - 1991

選擇規格尺寸點擊↓

(1#)

(3#)

10#

(12#)

1/4

5/16

3/8

7/16

1/2

5/8

3/4

括号内尺寸為非優選

尺寸單位: 英寸(inch)

英标BS 1981 - 1991 BS1981 1981BS 開槽沉頭螺釘（短的）Table 6

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單重計算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号等級

螺紋尺寸
d

(1#)

(3#)

10#

d_k	最大值
	最小值
k	最大值
	最小值
n	最大值
	最小值
t	最大值
	最小值

0.119	0.146	0.172	0.199	0.225	0.252	0.279	0.332	0.385
0.099	0.123	0.147	0.171	0.195	0.22	0.244	0.292	0.34
0.025	0.031	0.036	0.042	0.047	0.053	0.059	0.07	0.081
0.018	0.023	0.028	0.033	0.038	0.043	0.048	0.058	0.068
0.023	0.026	0.031	0.035	0.039	0.043	0.048	0.054	0.06
0.016	0.019	0..023	0.027	0.031	0.035	0.039	0.045	0.05
0.011	0.014	0.016	0.019	0.022	0.024	0.027	0.032	0.037
0.007	0.009	0.011	0.012	0.014	0.016	0.017	0.021	0.024

螺紋尺寸
d

(12#)

1/4

5/16

3/8

7/16

1/2

5/8

3/4

d_k	最大值
	最小值
k	最大值
	最小值
n	最大值
	最小值
t	最大值
	最小值

0.438	0.507	0.635	0.762	0.812	0.875	1.125	1.375
0.389	0.452	0.568	0.685	0.723	0.775	1.002	1.23
0.092	0.107	0.134	0.161	0.156	0.156	0.208	0.26
0.078	0.092	0.116	0.14	0.133	0.13	0.176	0.223
0.067	0.075	0.084	0.094	0.094	0.106	0.133	0.149
0.056	0.064	0.072	0.081	0.081	0.091	0.116	0.131
0.043	0.05	0.062	0.075	0.072	0.072	0.096	0.12
0.028	0.032	0.041	0.049	0.045	0.046	0.062	0.078

①,a(max)=1.5倍螺距

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)

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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34	[台灣] CNS 9678 - 1982	精密機械用開槽沉頭螺釘 Slotted Countersunk Screws For Fine Mechanics
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40	[德标] DIN EN ISO 2009 - 2011	開槽沉頭螺釘(通用頭型) A級 Slotted Countersunk Flat Head Screws(Common Head Style)-Product Grade A 供應商(3)
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43	[軍标] GJB 3372 (/56) - 1998	100°沉頭不脫出螺釘 Slotted 100 deg flat countersunk head screws, Waisted shank
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