6 Common Types of Screw Heads

Screw length does not include head of screw, #6 screws are narrower than #8 screws and are used on brackets with smaller holes and tracks with smaller slots

Robertson A Robertson screw, often referred to as a square or Scrulox screwdriver, has a square-shaped slot in the screw head and a

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slot betflix A Robertson screw, also known as a square screw or Scrulox, is a type of screw with a square-shaped socket in the screw head and a corresponding square