A Torx screw (often stylized as TORX) is a type of fastener characterized by its six-pointed, star-shaped recess in the head, designed to provide improved torque transfer and reduce the risk of cam-out (slippage between the tool and screw head) compared to traditional fasteners like slotted or Phillips screws.
Key Features:
Star-shaped recess: The six-point design distributes force more evenly across the contact surface, allowing higher torque application without damaging the screw head or tool.
Standardized sizing: Torx screws are identified by a "T" followed by a number (e.g., T10, T25), indicating the size of the recess. Smaller numbers correspond to smaller screws, commonly used in electronics, while larger sizes (e.g., T50) are found in automotive or industrial applications.
Security variants: Some Torx screws include a center pin (known as Torx Plus or Tamper-Resistant Torx, often labeled with a "TR" or "TP") to prevent unauthorized removal, used in security-sensitive settings like public infrastructure or electronics.
Advantages:
Reduced cam-out: The star shape minimizes slippage, protecting both the screw and tool from wear.
Higher torque capacity: Enables tighter fastening, making it ideal for high-stress applications (e.g., automotive engines, machinery).
Consistency: Standardized sizing ensures compatibility with Torx drivers, reducing errors in assembly.
Common Applications:
Electronics (smartphones, laptops)
Automotive manufacturing
Aerospace and industrial machinery
Consumer appliances
Developed by Camcar Textron in 1967, the Torx design has become a global standard for its reliability and efficiency in professional and DIY settings.
