Has
a similar thread design as a metric
socket head cap screw. However, the
dome-shaped head is wider and has
a lower profile than a metric socket
head cap screw. Generally manufactured
in accordance with ISO Standard 7380.
Used when a wider bearing surface
or a smoother, more finished appearance
is desired. Button head cap screws
do not afford the strength of socket
head cap screws and are designed for
light fastening applications. They
are not recommended for critical,
high-strength applications.
