They are easily identifiable by the star or “serrated” pattern on the head. Serrated flange bolts are most frequently used when attaching a flanged part to a flat surface such as an appliance, machine, or pump. They have a serrated surface on their head, which provides improved grip and prevents loosening due to vibration. These bolts are used to connect two unthreaded surfaces together, such as when fastening a flange to another flat surface. The star shaped bolts are most commonly referred to as Serrated Flange Bolts. Star bits are also known as Tamper Resistant Torx (TR) bits because the drive head features a pin in the center that makes it difficult to use a standard Torx tool to remove them. Star bits, aka star screwdrivers, have a five-pointed tip and are used for drive heads that have a hollowed-out center. Torx bits are star-shaped and have a six-pointed tip that fits into a Torx screw or bolt head. The terms are often used interchangeably but they are actually two different types of fasteners.
No, Torx and star bits are not the same thing. These bits make removal and installation of these hard to reach screws much easier and faster. The bit is made up of the star-shaped tip with a hole in the middle and is highly versatile in its compatibility with different screws. This design does not allow for other screwdriver tips to fit securely and prevents tampering.
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