What are the 5 different types of screw heads?

6 Common Types of Screw Drives

  • #1) Phillips-Head. Arguably, the most common type of screw drive is Phillips head.
  • #2) Flat-Head. Also known as a slot drive, a flat-head screw lives up to its namesake by supporting the use of a flat-head screwdriver.
  • #3) Hex.
  • #4) Torx.
  • #5) Double Hex.
  • #6) Robertson.

What is a screw with a head called?

Cap Screw. Refers to a hex head cap screw.

What is a Roundhead screw?

A Round Screw Head has a rounded or domed head. The half of the screw that remains visible when screwed into the surface is rounded and domed. Roundhead screws tend to be used less frequently that Flathead screws.

What is a mushroom head screw?

Mushroom Head Screws are wide headed, lower profile screws with a traditional slot drive. They are used for bolting softer materials, and are usually manufactured with a full thread. Their mushroom head is larger in diameter to create a larger bearing surface.

What is a Robertson screw head?

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 protrusion on the tool. Both the tool and socket have a slight taper.

How many different types of screw heads are there?

There are a lot of different types of screws.

What is truss head screw?

Truss head (or mushroom) screws are characterized by a low, slightly rounded surface and an extra-wide top. Truss head screws have a lower profile than other rounded head screws; thus, they can prevent tampering. Their wide head makes them suited to fasten sheet metal workpieces with large diameter holes.

Why are there no Robertson screws in America?

Most historians attribute its lack of popularity in the United States to Henry Ford. Having been nearly bankrupted by shady European licensees, Robertson refused to license his invention to Ford. Without a guaranteed supply, Ford turned to the Phillips-head screw, cementing its reign in American industry.