(1) Definition of Screws
In addition to the usual nail in carpentry known types of screw spikes are often used in the construction of wood called the screw. Screws are tools pengokoh in connection wood or metal having a spiral thread and form a pointed tip. Wood screws are usually made of metal having a spiral thread and a pointed tip. Screw head shape is generally round, flat, and arise depending on its use.
(2) Specifications
The difference between the nail with screws are contained head shape groove to turn the screws with a screwdriver and stem consists of a screw-threaded spiral shrinking of the base to the tip of the screw.
(3) Shape and Size
At the head of the screw there is a groove that has the shape, among others:
a. Screw head flower
Known fireworks because the screw head forms the plot that has the shape of flowers consisting of two intersecting grooves are often called taping.
b. Screw head gap
Ie groove-shaped screw head gaps or just one path only.
c. Dekskrup
Dekskrup is a screw having a head shape to rotate the nut and the screw using a key.
While this type of screw head, among others:
– Screw heads round
– average Screw heads
– Head of the tapered screw and head raised. In addition, there is also the screws used for connection to the timber construction is designed as a garnish. As for the size of the screw in the market consists of a 1/2 inc, inc 5/8, 3/4 inc, 1 inc, inc 1 1/4, 1 1/2 inc, inc 2, 2 1/2 and 3 inc inc ,
(4) Function
As in ordinary nails then screw was useful to embed and strengthen the two boards at a sambunganatau construction, the use of screws results lekatannya will be tougher than nails, but not all wood can be attached with screws, used only on certain things for example is used the hinge, on the connection that is not visible in the board connection table, cupboard, and others.
