Torx is a six sided star shape used on bolts. Draw a hexagon or six sided shape and on the flat sides between the points draw a V half way to the center between each point. That is the Torx shape.
The exact shape of the head is different. Similar tools are the Torx wrench or the Bristol wrench.The exact shape of the head is different. Similar tools are the Torx wrench or the Bristol wrench.
Torx is a family of screws/bolts, and their associated tools. They work very much like Allen screws, but instead of an internal hexagonal shape, Torx use a star shaped interface. The star shape can transmit more power than the hexagonal shape, protecting the user from stripping the bolt/screwheads. Just like Allen keys, Torx comes in several sizes, with T40 being one of them.
You are probably needing a #12 external-torx.
T-55
The Strongest Screwdriver: Torx Pro.---In improving the standard Torx, they identified that it had sharp edges, which meant that the very tips of the "star" shape of the Torx screwdriver were ultra-thin (of course, since it comes to a point, like the top of a triangle.) So, Torx Pro made the edges of the star rounded, and it has become the strongest screwdriver made.---------Some of the strongest screw drive shapes -- in no particular order -- are:hexagonal socket (Allen)square socket (Roberts)"hexalobular" socket (Torx, TTAP)external hexagonalexternal squareSome particularly weak screw drive shapes are:flat slotted (?)cross (Phillips, Frearson)spanner head, dual pin (?)The weak shapes are all too easy to strip the screw head or damage the driver or both.Yes, but which one is the strongest? Well I'll give my vote to TORX (hexagonal star) or the somewhat similar TTAP
The sensor is held in place by one small bolt with an external torx head.
Any external force to which a machine part is subjected
A machine screw typically has a slotted or Phillips drive whereas a cap screw typically has a socket or torx head.
E12 external torx
A train DUHHH! An external combustion engine.
Rather than a screw or bolt head having a single slot to take a screwdriver, a torx screw head system uses a six-pointed star shape, and a screwdriver designed to fit.