Flat Head Socket Screws

Flat Head Socket Screws, also known as hex socket button head cap screws or dome nuts, are a fastener that features a flat countersunk head that sits flush with the fastened surface. They are popular for applications that require a low-profile fastener to minimize the chance of snagging or damaging items that move overhead. These fasteners are also well suited to applications that require a high-strength, reliable fastener for heavy duty use in demanding environments.

Designed for installation with a hex key, these fasteners are a great alternative to bolts and other types of screw when limited space is available. Their compact size and rounded head allow them to be installed within tight areas where a traditional socket head cap screw would not fit. These fasteners also have a deeper hex recess and thick side walls that give them higher maximum preload ratings than other socket screw types.

When choosing a flat head socket screw, the tensile strength of the screw should be evaluated to ensure it can sustain the required load. The screw’s material compatibility with the components it will fasten should also be taken into consideration, as incompatible materials may cause galvanic corrosion and reduce the lifespan of the assembly. Other factors that influence the choice of a socket screw include the environmental conditions, such as humidity or temperature, and the torque requirements for tightening and loosening. Using screws made from durable materials like stainless steel can help to avoid corrosion and extend the life of the assembly.