Screw Types

Torx screws have a shape in the head that resembles a six sided star. These allow for a greater torque strength. There is also a security version for secure environments that incorporates a pin in the centre of the star so common drivers will not fit to release the fixing.

Screw Usability

Plasterboard Screws

These are usually supplied with a metal plus that screws into the plasterboard with a large pitch thread. The screws used to fix material down are then driven into these plugs. Depending on the fixing material, plasterboard screws with a trumpet head can be used without the plug. These have a strong torque fixing, but not a forceful impact. These can come with a sharp, perforated or self-drilling tip.

Self-Drilling Screws

Self drilling screws do not require the drilling of a pilot hole to be installed. Theses screws, that are most commonly found on facades and roof producs such as purlins. They are often supplied with an EPDM washer that seals the bottom of the head against the fixing material to prevent water ingress.

Security Screws

Security screws come in a variety of head styles that une non-uniform tooling. The purpose of these is that the screws can then not be removed by anyone without the correct tooling making them ideal for areas that need to be securely held down. The required tooling is usually not available from merchants that do not sell those screws.  A number of these screw types are also permanent meaning that they can not be removed at all.

Standard Screws

This includes all standard screws that are made to predetermined specifications, usually set by either the DIN or BS standard. These standards provide exact details on all the dimensions of a screw and regulate, for example, that the head diameter n each size screw is also the same, not matter the manufacturer.

Wood Screws

Wood screws, of which coach screws are the most common type with a hexagon head, have a large thread pitch that provides a stronger more secure hold. Caps of multiple colours can be used to decorate if the screw head will be on show.