Screws Types

-

Types of Screws

Following are some common type of Screws:

1. Deck Screws

2. Hex Lag Screws

3. Self-Drilling Screws

4. Sheet Metal Screws

5. Wood Screws


1. Deck Screws:

 Deck Screws




Deck screws have a notched point at the tip to assist in chip removal during thread cutting which allows for a simple installation in wood and composite deck materials. A bugle head and square drive help to eliminate the stripping effect sometimes experienced with other types of drives.


2. Hex Lag Screws:

 Hex Leg Screws




Lag screws, also called lag bolts, are large wood screws. The head is external hex and are driven with a wrench. Used for lag together lumber for framing, machinery to wood floors, and other heavy duty applications.


3. Self-Drilling Screws:

 Self-Drilling Screws




Self-drilling screws have a sheet metal thread with a self-driller cutting (TEK) point to pierce through 20 to 14 gauge metals. The higher the TEK number, the larger the drill point to pierce heavier gauge metals.


4. Sheet Metal Screws:

 Sheet Metal Screws




Sheet metal screws have sharp cutting threads that cut into sheet metal, plastic or wood. They have a fully threaded shank and sometimes have a notched point at the tip to aid in chip removal during thread cutting.


5. Wood Screws:

 Wood Screws


Wood screws are partially threaded with large cutting threads and a smooth shank. They are designed to slip through the highest piece of wood and tightly pull all boards together.





Comments

Post a Comment

Popular posts from this blog

Definition and Parts of a Vernier Caliper

-
Image
Vernier Caliper and Its Parts:   Vernier Caliper Vernier Caliper: The vernier caliper is a measuring tool wont to get precise linear dimension measurements. A vernier micrometer is particularly useful to live the diameter of cylindrical objects as its jaws can clamp either side to urge accurate measurements. Main Parts of a Vernier caliper:   1. Upper Jaws or Inside Jaws   2. Lower Jaws or Outside Jaws 3. Depth Rod   4. Main Scale 5. Vernier Scale 6. Lock Screw 7. Thumb Screw 1. Upper Jaws or Inside Jaws: The upper jaws are smaller in size and are attached to the upper portion of the vernier micrometer. Similar to the lower jaws, one of these jaws is fixed and the other is movable. The difference between them and the lower jaws is that the upper jaws are used for measuring inside dimensions of hollow objects such as inside diameters of pipes, lengths and widths of boxes etc. The jaws are placed inside the place to be measur...
Read more

Micrometer and it's main parts

-
Image
Micrometer and It's Parts:  Micrometer   Micrometer: The micrometer may be a precision measuring system, employed by engineers. Each revolution of the rachet moves the spindle face 0.5mm towards the anvil face. The object to be measured is placed between the anvil face and the spindle face. The rachet is turned clockwise until the thing is ‘trapped’ between these two surfaces and therefore the rachet makes a ‘clicking’ noise. This means that the rachet can't be tightened anymore and therefore the measurement are often read.   Main Parts of Micrometer: 1.      Main Frame 2.      Zero adjusts screw 3.      Anvil 4.      Spindle 5.      Anvil Face and Spindle Face 6.      Lock Nut 7.      Sleeve 8.      Thimble 9.      Rachet 1.      Mai...
Read more

Milling Machine

-
Image
Milling Machine: Milling machine is one of the best machines in Mechanical World. Milling is that the process of removing metal by feeding the work past a rotating multipoint cutter. In milling operation the speed of metal removal is rapid because the cutter rotates at a high speed and has many cutting edges. Thus the jobs are machined at a faster rate than with single point tools and the surface finish is also better due to multi-cutting edges. Milling machine is one among the foremost important machine tools in a tool room as nearly all the operations are often performed thereon with high accuracy. The indexing head makes the machine suitable for therefore many purposes as exact rotation of job is feasible by its use. Milling machine augments the work of a lathe and may produce the plain and curved surfaces and also helical grooves etc. The miller could also be so arranged that the several cutters are mounted on the arbor at an equivalent time, thus increasing the metal rem...
Read more