Flat Socket Cap Screws
A flat socket head cap screw is a type of fastener commonly used in machinery, automotive, and construction applications. It features a flat, cylindrical head with a hexagonal socket (recess) in the center, allowing it to be tightened or loosened with a hex key or Allen wrench. The flat head design provides a flush surface when installed, which can be useful when a smooth finish is desired or when the screw head shouldn’t protrude from the surface of the material it’s fastening. These screws are often used in situations where a low-profile, flush fastener is needed, such as in machinery assemblies or when securing parts together in tight spaces.
It’s also worth noting that there’s a difference in the angle of the head between imperial and metric flat socket head cap screws. Imperial (inch-based) flat socket head cap screws typically feature an 82-degree angle under the head, while metric flat socket head cap screws generally have a 90-degree angle. This variation in angle is important to consider, especially when selecting the appropriate tool for tightening or loosening the screw.
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