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IQ QUIZ#
24
CATEGORY
Precision Machining
What’s the proper angle for countersinking a standard flat-head screw?
A
82 Degrees
B
90 Degrees
C
100 Degrees
D
60 Degrees
What’s the proper angle for countersinking a standard flat-head screw?
A
82 Degrees is the proper angle for countersinking a standard flat-head screw.
WHY
The standard countersink angle for most flat-head screws in the U.S. is 82 degrees, designed to match the screw’s head for a flush fit.
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