Combi head screws, also called combination head or combo head screws, are externally threaded fasteners with torquing heads. They feature a socket designed to engage with two or more types of internal drivers.
These are not to be confused with combi screws, which are fasteners designed for more than one application.
Combi head screws are designed to increase the chance of having a suitable driver available with which to tighten or loosen the fastener. Combi head screws are commonly available in drive combinations including:
- Slotted and Phillips
- Slotted and Robertson
- Phillips and Robertson
- Torx and Robertson
- Slotted, Pozidriv, and slotted
- Phillips and Robertson