Torx
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Torx is a brand of screw drive characterized by a 6-point star-shaped pattern, developed in 1967 by Camcar Textron. A popular generic name for the drive is star, as in star screwdriver or star bits. T
A security Torx L-key and fastener with holes for a safety pin to hinder disassembly with an ordinary Torx key.
A Torx T8 screw head on a hard disk drive.
External Torx driver
Torx bits T15, T20, T25, and T30
ISO metric screw thread
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The ISO metric screw thread is the most commonly used type of general-purpose screw thread worldwide. They were one of the first international standards agreed when the International Organization for
Profile of an M20 thread.