Wood screws are used to fasten wood to wood or attach objects to wood and offer an aesthetically appealing finish. The purpose of wood screws is to pull wood pieces together as they are tightened making clamping superfluous. These can be removed far more easily than nails enabling the user to dismantle the assembled furniture or fixtures with relative speed and least damage.
These come in a large range:
Countersunk Slotted Head
Blunt thread angle of 60° (displaces material, risk of splitting)
Thicker minor diameter
Deforms the wood, so predrilling is recommended
The slotted screw is commonly found in existing products and installations, along with use in simple carpentry work and in applications where minimal torque is needed. Slotted screws are also used in the restoration of antique furniture, vehicles, and equipment.
Specification: DIN-97, IS-6760
COACH SCREW/ LAG BOLT
These are heavy duty screws designed with a square or hexagonal head engineered to be used with a wrench, spanner, or pliers.
When driven into timber, the threaded shaft bites into the wood.
Specifications: DIN 571, IS-549
Typical Uses: for metal to timber connections, or to join heavy timbers.
Fixing clamps, plates to flooring, walls, Dish Antennas, road humps etc
Mirror Screws are an elegant way to fix mirrors and displays.
These are specially designed screws that come in two parts. The screw part is the same as any other screw except that it has a tiny threaded hole drilled in the screw head, into which you screw the second part of the design – a small dome shaped cap.
Chipboard Wood Screws
Chipboard screws, also called speed screws, are developed to prevent the problems arising with the application of the conventional wood screws in chipboard and different type of wood.
This type of screw can be used in chipboard and soft wood types without pre-drilling, due to its thin core diameter and sharp angle of the thread. This sharp thread cuts into wood with lower splitting effects, while simultaneously reducing the insertion torque. This combination increases the battery life on the used power tools and has the advantage of saving production time. The pull-out forces are also more consistent from the reduced splitting. These are normally available fully threaded.