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2024-03-07 17:40:02
CA1820 (CCA1820) 中国国际航空公司 航班跟踪和历史数据 - FlightAware
CA1820 (CCA1820) 中国国际航空公司 航班跟踪和历史数据 - FlightAware
产品
数据产品
AeroAPI
可按需提供飞行状态和航班跟踪数据的航班数据API。
FlightAware Firehose
专为企业集成而开发的实时、历史和预测性航班数据流式馈送。
FlightAware Foresight
Predictive technology to strengthen customer trust in your operations
Rapid Reports
快速购买并通过电子邮件接收历史报告。
Custom Reports
咨询性定制详细航班跟踪数据报告。
Integrated Mapping Solutions
Incorporate FlightAware maps in your web and mobile applications
应用程序
FlightAware Aviator
适合小型飞机/通用航空（GA）机主和运营商的终极飞行跟踪套件。
Premium Subscriptions
个性化的航班跟踪体验，享有无限数量的提醒及其他优势。
FlightAware Global
为公务航空（BA）机主和运营商提供的行业标准飞行跟踪平台。
FlightAware FBO Toolbox
全面的航班跟踪，帮助提升FBO运营水平，促进销售。
FlightAware TV
适合运营商或FBO的全屏FlightAware TV地图。
GlobalBeacon
为航空公司和飞机运营商提供的符合GADSS标准的全球跟踪和警报。
行业
航空公司
机场
空中交通管制
机主和运营商
政府
ADS-B
统计
SkyAware Anywhere
覆盖图
ADS-B Store
构建PiAware ADS-B接收设备
FlightFeeder
常见问题
航班跟踪
延误和取消
取消
机场延误
MiseryMap
搜索航班
航班搜索
按营运公司浏览
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获取FlightAware应用，在您的设备上获得最佳航班跟踪体验。
加入FlightAware 登录10:38 CET
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产品
数据产品
AeroAPI
可按需提供飞行状态和航班跟踪数据的航班数据API。
FlightAware Firehose
专为企业集成而开发的实时、历史和预测性航班数据流式馈送。
FlightAware Foresight
Predictive technology to strengthen customer trust in your operations
Rapid Reports
快速购买并通过电子邮件接收历史报告。
Custom Reports
咨询性定制详细航班跟踪数据报告。
Integrated Mapping Solutions
Incorporate FlightAware maps in your web and mobile applications
应用程序
FlightAware Aviator
适合小型飞机/通用航空（GA）机主和运营商的终极飞行跟踪套件。
Premium Subscriptions
个性化的航班跟踪体验，享有无限数量的提醒及其他优势。
FlightAware Global
为公务航空（BA）机主和运营商提供的行业标准飞行跟踪平台。
FlightAware FBO Toolbox
全面的航班跟踪，帮助提升FBO运营水平，促进销售。
FlightAware TV
适合运营商或FBO的全屏FlightAware TV地图。
GlobalBeacon
为航空公司和飞机运营商提供的符合GADSS标准的全球跟踪和警报。
行业
航空公司
机场
空中交通管制
机主和运营商
政府
ADS-B
统计
SkyAware Anywhere
覆盖图
ADS-B Store
构建PiAware ADS-B接收设备
FlightFeeder
常见问题
航班跟踪
延误和取消
取消
机场延误
MiseryMap
搜索航班
航班搜索
按营运公司浏览
按机场浏览
按机型浏览
其他
随机机场
随机航班
IFR航线分析器
现在就下载Flightaware应用。
社区
照片
热门照片
最新照片
排名最高
编辑推荐
最新评论
社区标签
上传您的照片
新闻
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所有讨论
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Advertise With Us
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联系我们
实时地面地图仅供部分FlightAware付费订阅专享。
Surface map is loading
实时地面地图仅供部分FlightAware付费订阅专享。
实时地面地图仅供部分FlightAware付费订阅专享。
此对话框将在60秒后关闭，或者您也可以点击右上角的退出图标，马上返回飞行地图。
感谢您尝试我们全新的实时地面地图功能。我们希望您能花几分钟时间提出您的反馈意见。
意见反馈
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AeroAPI
FlightAware Firehose
FlightAware Foresight
快速报告
定制报告
FlightAware Aviator
高级订阅
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CA1820：使用字符串长度测试是否有空字符串（代码分析） - .NET | Microsoft Learn
CA1820：使用字符串长度测试是否有空字符串（代码分析） - .NET | Microsoft Learn
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CA1820:使用字符串长度测试是否有空字符串
项目
09/07/2023
3 个参与者
反馈
本文内容
属性
值
规则 ID
CA1820
标题
使用字符串长度测试是否有空字符串
类别
“性能”
修复是中断修复还是非中断修复
非中断
在 .NET 8 中默认启用
否
原因
使用了 Object.Equals 将字符串与空字符串进行比较。
规则说明
使用 String.Length 属性或 String.IsNullOrEmpty 方法比较字符串比使用 Equals 更快。 这是因为 Equals 执行的 MSIL 指令比 IsNullOrEmpty 或执行以用于检索 Length 属性值并将其与零进行比较的指令数要多得多。
对于 NULL 字符串，Equals 和
如何解决冲突
若要解决此规则的冲突，请更改比较以使用 IsNullOrEmpty 方法。
何时禁止显示警告
如果性能不是问题，可禁止显示此规则的警告。
抑制警告
如果只想抑制单个冲突，请将预处理器指令添加到源文件以禁用该规则，然后重新启用该规则。
#pragma warning disable CA1820
// The code that's violating the rule is on this line.
#pragma warning restore CA1820
若要对文件、文件夹或项目禁用该规则，请在配置文件中将其严重性设置为 none。
[*.{cs,vb}]
dotnet_diagnostic.CA1820.severity = none
有关详细信息，请参阅如何禁止显示代码分析警告。
示例
下面的示例演示了用于查找空字符串的不同技术。
public class StringTester
{
string s1 = "test";
public void EqualsTest()
{
// Violates rule: TestForEmptyStringsUsingStringLength.
if (s1 == "")
{
Console.WriteLine("s1 equals empty string.");
}
}
// Use for .NET Framework 1.0 and 1.1.
public void LengthTest()
{
// Satisfies rule: TestForEmptyStringsUsingStringLength.
if (s1 != null && s1.Length == 0)
{
Console.WriteLine("s1.Length == 0.");
}
}
// Use for .NET Framework 2.0.
public void NullOrEmptyTest()
{
// Satisfies rule: TestForEmptyStringsUsingStringLength.
if (!String.IsNullOrEmpty(s1))
{
Console.WriteLine("s1 != null and s1.Length != 0.");
}
}
}
在 GitHub 上与我们协作
可以在 GitHub 上找到此内容的源，还可以在其中创建和查看问题和拉取请求。 有关详细信息，请参阅参与者指南。
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CA1820: Test for empty strings using string length (code analysis) - .NET | Microsoft Learn
CA1820: Test for empty strings using string length (code analysis) - .NET | Microsoft Learn
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CA1820: Test for empty strings using string length
Article
09/05/2023
3 contributors
Feedback
In this article
Property
Value
Rule ID
CA1820
Title
Test for empty strings using string length
Category
Performance
Fix is breaking or non-breaking
Non-breaking
Enabled by default in .NET 8
No
Cause
A string is compared to the empty string by using Object.Equals.
Rule description
Comparing strings using the String.Length property or the String.IsNullOrEmpty method is faster than using Equals. This is because Equals executes significantly more MSIL instructions than either IsNullOrEmpty or the number of instructions executed to retrieve the Length property value and compare it to zero.
For null strings, Equals and
How to fix violations
To fix a violation of this rule, change the comparison to use the IsNullOrEmpty method.
When to suppress warnings
It's safe to suppress a warning from this rule if performance is not an issue.
Suppress a warning
If you just want to suppress a single violation, add preprocessor directives to your source file to disable and then re-enable the rule.
#pragma warning disable CA1820
// The code that's violating the rule is on this line.
#pragma warning restore CA1820
To disable the rule for a file, folder, or project, set its severity to none in the configuration file.
[*.{cs,vb}]
dotnet_diagnostic.CA1820.severity = none
For more information, see How to suppress code analysis warnings.
Example
The following example illustrates the different techniques that are used to look for an empty string.
public class StringTester
{
string s1 = "test";
public void EqualsTest()
{
// Violates rule: TestForEmptyStringsUsingStringLength.
if (s1 == "")
{
Console.WriteLine("s1 equals empty string.");
}
}
// Use for .NET Framework 1.0 and 1.1.
public void LengthTest()
{
// Satisfies rule: TestForEmptyStringsUsingStringLength.
if (s1 != null && s1.Length == 0)
{
Console.WriteLine("s1.Length == 0.");
}
}
// Use for .NET Framework 2.0.
public void NullOrEmptyTest()
{
// Satisfies rule: TestForEmptyStringsUsingStringLength.
if (!String.IsNullOrEmpty(s1))
{
Console.WriteLine("s1 != null and s1.Length != 0.");
}
}
}
Collaborate with us on GitHub
The source for this content can be found on GitHub, where you can also create and review issues and pull requests. For more information, see our contributor guide.
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CA1820 Series LiveLock™ - Stud Nuts, 100° C´Sink Head, Hex Recess On Howmet Aerospace
CA1820 Series LiveLock™ - Stud Nuts, 100° C´Sink Head, Hex Recess On Howmet Aerospace
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Catalog > Panel Fasteners > LiveLock™ - Structural Panel Fasteners > Stud Nuts, LiveLock™ Stuctural Panel Fasteners > CA1820 Series LiveLock™ - Stud Nuts, 100° C´Sink Head, Hex Recess > View Items CatalogCatalog Panel FastenersPanel Fasteners LiveLock™ - Structural Panel FastenersLiveLock™ - Structural Panel Fasteners Stud Nuts, LiveLock™ Stuctural Panel FastenersStud Nuts, LiveLock™ Stuctural Panel Fasteners CA1820 Series LiveLock™ - Stud Nuts, 100° C´Sink Head, Hex RecessCA1820 Series LiveLock™ - Stud Nuts, 100° C´Sink Head, Hex Recess View Items
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CA1820-0
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
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N/A 0.095-0.155 in
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N/A 0.375 in
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N/A 0.200 lb
CA1820-1
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N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
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N/A 0.156-0.250 in
L
N/A 0.437 in
Weight/100
N/A 0.330 lb
CA1820-2
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N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
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N/A 0.251-0.343 in
L
N/A 0.531 in
Weight/100
N/A 0.460 lb
CA1820-3
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N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 0.344-0.437 in
L
N/A 0.625 in
Weight/100
N/A 0.520 lb
CA1820-4
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 0.438-0.531 in
L
N/A 0.718 in
Weight/100
N/A 0.630 lb
CA1820-5
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N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 0.532-0.625 in
L
N/A 0.812 in
Weight/100
N/A 0.740 lb
CA1820-6
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 0.626-0.718 in
L
N/A 0.906 in
Weight/100
N/A 0.850 lb
CA1820-7
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
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N/A 0.719-0.812 in
L
N/A 1.000 in
Weight/100
N/A 0.960 lb
CA1820-8
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 0.813-0.906 in
L
N/A 1.093 in
Weight/100
N/A 1.070 lb
CA1820-9
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 0.907-1.000 in
L
N/A 1.187 in
Weight/100
N/A 1.180 lb
CA1820-10
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 1.001-1.093 in
L
N/A 1.281 in
Weight/100
N/A 1.290 lb
CA1820-11
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 1.094-1.187 in
L
N/A 1.375 in
Weight/100
N/A 1.400 lb
CA1820-12
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 1.188-1.821 in
L
N/A 1.468 in
Weight/100
N/A 1.510 lb
CA1820-13
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 1.282-1.375 in
L
N/A 1.562 in
Weight/100
N/A 1.620 lb
CA1820-14
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 1.376-1.468 in
L
N/A 1.656 in
Weight/100
N/A 1.7300 lb
CA1820-15
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 1.469-1.562 in
L
N/A 1.750 in
Weight/100
N/A 1.840 lb
CA1820-16
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 1.563-1.656 in
L
N/A 1.843 in
Weight/100
N/A 1.950 lb
CA1820-17
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 1.657-1.750 in
L
N/A 1.936 in
Weight/100
N/A 2.060 lb
CA1820-18
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Passivate per AMS2700
Grip Range
N/A 1.751-1.843 in
L
N/A 2.032 in
Weight/100
N/A 2.170 lb
CA1820-0B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 0.095-0.155 in
L
N/A 0.375 in
Weight/100
N/A 0.200 lb
CA1820-1B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 0.156-0.250 in
L
N/A 0.437 in
Weight/100
N/A 0.330 lb
CA1820-2B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 0.251-0.343 in
L
N/A 0.531 in
Weight/100
N/A 0.460 lb
CA1820-3B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 0.344-0.437 in
L
N/A 0.625 in
Weight/100
N/A 0.520 lb
CA1820-4B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 0.438-0.531 in
L
N/A 0.718 in
Weight/100
N/A 0.630 lb
CA1820-5B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 0.532-0.625 in
L
N/A 0.812 in
Weight/100
N/A 0.740 lb
CA1820-6B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 0.626-0.718 in
L
N/A 0.906 in
Weight/100
N/A 0.850 lb
CA1820-7B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 0.719-0.812 in
L
N/A 1.000 in
Weight/100
N/A 0.960 lb
CA1820-8B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 0.813-0.906 in
L
N/A 1.093 in
Weight/100
N/A 1.070 lb
CA1820-9B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 0.907-1.000 in
L
N/A 1.187 in
Weight/100
N/A 1.180 lb
CA1820-10B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 1.001-1.093 in
L
N/A 1.281 in
Weight/100
N/A 1.290 lb
CA1820-11B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 1.094-1.187 in
L
N/A 1.375 in
Weight/100
N/A 1.400 lb
CA1820-12B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 1.188-1.821 in
L
N/A 1.468 in
Weight/100
N/A 1.510 lb
CA1820-13B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 1.282-1.375 in
L
N/A 1.562 in
Weight/100
N/A 1.620 lb
CA1820-14B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 1.376-1.468 in
L
N/A 1.656 in
Weight/100
N/A 1.7300 lb
CA1820-15B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 1.469-1.562 in
L
N/A 1.750 in
Weight/100
N/A 1.840 lb
CA1820-16B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 1.563-1.656 in
L
N/A 1.843 in
Weight/100
N/A 1.950 lb
CA1820-17B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 1.657-1.750 in
L
N/A 1.936 in
Weight/100
N/A 2.060 lb
CA1820-18B
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Black Oxide per MIL-DTL-13924
Grip Range
N/A 1.751-1.843 in
L
N/A 2.032 in
Weight/100
N/A 2.170 lb
CA1820-0C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 0.095-0.155 in
L
N/A 0.375 in
Weight/100
N/A 0.200 lb
CA1820-1C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 0.156-0.250 in
L
N/A 0.437 in
Weight/100
N/A 0.330 lb
CA1820-2C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 0.251-0.343 in
L
N/A 0.531 in
Weight/100
N/A 0.460 lb
CA1820-3C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 0.344-0.437 in
L
N/A 0.625 in
Weight/100
N/A 0.520 lb
CA1820-4C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 0.438-0.531 in
L
N/A 0.718 in
Weight/100
N/A 0.630 lb
CA1820-5C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 0.532-0.625 in
L
N/A 0.812 in
Weight/100
N/A 0.740 lb
CA1820-6C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 0.626-0.718 in
L
N/A 0.906 in
Weight/100
N/A 0.850 lb
CA1820-7C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 0.719-0.812 in
L
N/A 1.000 in
Weight/100
N/A 0.960 lb
CA1820-8C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 0.813-0.906 in
L
N/A 1.093 in
Weight/100
N/A 1.070 lb
CA1820-9C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 0.907-1.000 in
L
N/A 1.187 in
Weight/100
N/A 1.180 lb
CA1820-10C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 1.001-1.093 in
L
N/A 1.281 in
Weight/100
N/A 1.290 lb
CA1820-11C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 1.094-1.187 in
L
N/A 1.375 in
Weight/100
N/A 1.400 lb
CA1820-12C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 1.188-1.821 in
L
N/A 1.468 in
Weight/100
N/A 1.510 lb
CA1820-13C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 1.282-1.375 in
L
N/A 1.562 in
Weight/100
N/A 1.620 lb
CA1820-14C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 1.376-1.468 in
L
N/A 1.656 in
Weight/100
N/A 1.7300 lb
CA1820-15C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 1.469-1.562 in
L
N/A 1.750 in
Weight/100
N/A 1.840 lb
CA1820-16C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 1.563-1.656 in
L
N/A 1.843 in
Weight/100
N/A 1.950 lb
CA1820-17C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 1.657-1.750 in
L
N/A 1.936 in
Weight/100
N/A 2.060 lb
CA1820-18C
Material
N/A 300 CRES per ASTM-A581/582/320/, AMS5640/AMS5738 and/or AMS-QQ-S-763
Finish
N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2
Grip Range
N/A 1.751-1.843 in
L
N/A 2.032 in
Weight/100
N/A 2.170 lb
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CA1820-1 Livelock™ Flush Head Hex Recess Stud Nut
CA1820-1 Livelock™ Flush Head Hex Recess Stud Nut
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Clampco
Hydraflow® Couplings & Hoses
Wiggins Connectors
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Grommet Strip & Edge Protection
Heat Reflective Tapes and Foils
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Hook & Loop
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Keensert® Inserts
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CA1820-1 Livelock™ Flush Head Hex Recess Stud Nut
Part NumberCA1820-1** See PDF Document in 'Download' window for available Lengths, Installation Instructions, Retaining rings and Receptacles **Stud Length0.437"Grip Range (inches/mm)0.156-0.250 / 3.96-6.35Material300 Series CRESFinishPassivated per QQ-P-35
Downloads:
livelock_full_catalogue.pdf
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ms.date\n f1_keywords\n helpviewer_keywords\n author\n ms.author\n \n \n \n \n CA1820: Test for empty strings using string length (code analysis)\n Learn about code analysis rule CA1820: Test for empty strings using string length\n 11/04/2016\n \n \n \n TestForEmptyStringsUsingStringLength\n CA1820\n \n \n\n\n \n \n \n TestForEmptyStringsUsingStringLength\n CA1820\n \n \n\n\n gewarren\n gewarren\n \n \n\n\nCA1820: Test for empty strings using string length\n\n\n\nProperty\nValue\n\n\n\n\nRule ID\nCA1820\n\n\nTitle\nTest for empty strings using string length\n\n\nCategory\nPerformance\n\n\nFix is breaking or non-breaking\nNon-breaking\n\n\nEnabled by default in .NET 8\nNo\n\n\n\nCause\nA string is compared to the empty string by using xref:System.Object.Equals%2A?displayProperty=nameWithType.\nRule description\nComparing strings using the xref:System.String.Length%2A?displayProperty=nameWithType property or the xref:System.String.IsNullOrEmpty%2A?displayProperty=nameWithType method is faster than using xref:System.Object.Equals%2A. This is because xref:System.Object.Equals%2A executes significantly more MSIL instructions than either xref:System.String.IsNullOrEmpty%2A or the number of instructions executed to retrieve the xref:System.String.Length%2A property value and compare it to zero.\nFor null strings, xref:System.Object.Equals%2A and