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countersunk bolts - Standard

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braham0793

braham0793

Mechanical
Joined
Sep 3, 2015
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36
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PE
Dear;

Good Morning,

Someone who can tell me the American standard for countersunk bolts?

Best regards.
 
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Depends on the drive configuration. Some have 80° countersinks and some have 100° countersinks.
 
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It's ASME/ANSI B18.5
Can also look inside Machinery's Handbook.
 
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Depends on the application. Flush head bolts/screws used in the US aerospace industry are mostly 100deg. Commercial flush head machine bolts/screws are mostly 90deg or 82deg. The common FHCS, like those from Unbrako, are typically 82deg.
 
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