Hexagonalheaded

Hexagonalheaded is an adjective used to describe objects that possess a hexagonal (six-sided) head. The term is most commonly applied in hardware contexts to fasteners that require a wrench or spanner to turn.

In hardware, hexagonal-headed fasteners include hex bolts and hex screws, which feature a six-sided head designed for external drive tools. The hex head provides multiple flat surfaces that enable the application of high torque while reducing the likelihood of cam-out compared with some other head shapes. These fasteners are produced in various materials and finishes, such as carbon steel, stainless steel, and alloy variants, and are standardized by international and national bodies.

Hexagonal-headed fasteners should be distinguished from socket-head or button-head fasteners, which have internal drives or different head profiles. The term itself is descriptive; in catalogs, the items are usually named hex bolts, hex cap screws, or hex screws, with the head geometry implied rather than asserted as a distinct product category.

Etymology: hexagonalheaded combines hexagonal, from the Greek hex, meaning six, and gonia, meaning angle, with headed, indicating the presence of a head. See also hex bolt, hex cap screw, socket head cap screw.