Flange screws are also known as frame screws. The head of the flange screws can be circular to hexed and are extended out from circular flange situated directly below the head. The flange at the head provide stability to the screw for remaining in the position and take the position of washer.
4. Truss Head Screws: ( Types of Screw Heads )
Truss Head Screws
In comparison to the other screw head truss screw head are wider and they have a rounded surface. Truss head screws are used for sheet metal or for the work where there is the requirement of large holes and the wider head of the screw prevent them from going into the hole.
C) Combination Head Screws
Combination Head Screws
Combination head screws are very common nowadays, they have variation and combination of above given head types.
A countersink screw heads have angular shape under the head but the screw in which countersink is not required have flat under the head.
D) Tamper Resistant Screws
These screws are variations of few common types of screws like hex, Phillips. They are best suited for public places where the chances of theft are high such as public restrooms. Following are the types of tamper resistant screws in which there are multiple levels of security:
1. Pin Head Screws: ( Types of Screw Heads )
Pin Head Screws
Pin screws are one of the most common tamper resistant screw, they have same design like a cross shape in Philips screw having additional layer which is provided for the prevention of easy removal. In design there is additional pin in each head and they need special tool for removal and installation. For the removal and installation of a tamper resistant Philips screw, Philips screwdriver cannot be used.
2. Sentinel Screw Head: ( Types of Screw Heads )
Sentinel Screw Head
These screws provide very high level of protection because they can be driven only in one way. They are very difficult to remove therefore they are best suited for permanent fixtures.
3. 2 Hole Screws: ( Types of Screw Heads )
2 Hole Screws
They are also called as spanners; they provide security with maintaining the finished look. Their heads are flat in which there are two small holes are provided and they need special tool for their installation as well as removal.
E) Screw Head Drive Type Screws
In this category there are some screws which require specific type of screwdriver for their installation.
1. External Hex Screw: ( Types of Screw Heads )
External Hex Screw
They have hexagonal shape at head which extend beyond its surface. Some of them have built in flange while other have hexagon shape over their full head. This screw can be removed and installed with the help of a wrench.
2. Internal Hex Screw: ( Types of Screw Heads )
Internal Hex Screw
These type of screw always need an Allen wrench for their installation as well as their removal. They are generally used for furniture which need assembly and cannot get damage by Allen wrench at the time of installation which results in pleasing finish. Most of these
