A flat socket cap screw, also known as a countersunk socket cap screw, countersunk flat socket screw or, Allen flat head socket bolt, is a type of cap screw with a flat head and hexagonal (Allen) drive hole.
Flat Head Socket Cap Screws are bolts or machine screws with a Hex or Allen drive style.
Corrosion Resistant
Acceptable for exterior applications exposed to fresh water moisture.
The term flat socket head cap screw typically refers to a type of threaded fastener whose head diameter is nominally 2 times or more that of the screw shank diameter.