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A screw generally refers to a screw. A screw is a tool that utilizes the physical and mathematical principles of the oblique circular rotation and friction of an object to gradually tighten the mechanical components of the object. Screws are a common term for fasteners, and they are an indispensable industrial necessity in daily life.
Following material can be used in the manufacturing of screws.
● Titanium: Screws made of Titanium are hard, strong, light and corrosion resistant. When alloyed with other materials it can increase strength and durability.
● Stainless steel: Screws made from stainless steel are chemical and corrosion resistant. They have an appealing surface finish. They can not be hardened like carbon steel.
● Hardened steel: Screws made from hardened steel are hard but brittle in nature.
● Steel: Screws made from steel are strong but they are vulnerable to corrosion.
● Plastic: Screws made from plastic are inexpensive and corrosion resistant. They are used for light loads. They are commonly used near water, such as water pools.
● Molybdenum: Screws made from Molybdenum have very high melting point and are exceptionally strong.
● Copper alloy: Screws made from copper alloy have good load capacity and are wear resistant. They are suitable for use near magnets.
● Brass: Screws made of Brass are strong, conductive and corrosion resistant. They have low magnetic permeability.
● Aluminium: Screws made of Aluminium are light and easy to manufacture. They are thermally and electrically conductive. They are resistant to corrosion.
● Super alloys: Screws made of super alloys show good mechanical strength, surface stability, corrosion resistance and resistance to creep at higher temperatures. Some common super alloys include Hastelloy®, Inconel®, Incoloy®, and Monel®.
Apart from above material, sometimes some finishing material is also used in screws. It can provide durability and corrosion resistance to the screw. Here are some finishing materials used in screws.
● Zinc: Its coating acts as a sacrificial anode, protecting the underlying metal. It is applied as fine white dust.
● Chrome: Its coating gives a bright, reflective finish. It is decorative and very durable. It is applied by electroplating.
● Black oxide: Its coating is mostly used for aesthetic purpose. It does not enlarge the dimensions of the screw. It is a processed black rust.
Types Of Screws
| Deck Screws | Hex Lag Screws | Self-Drilling Screws | Sheet Metal Screws | Wood Screws |
 |  |  |  |  |
Product Parameters
| THREAD DIAMETER | |||
| Size | Nearest Fraction | Inch | Millimeter |
| #0 | 1/16 | 0.06 | 1.5 |
| #1 | 5/64 | 0.07 | 1.8 |
| #2 | 3/32 | 0.08 | 2.0 |
| #3 | 7/64 | 0.09 | 2.3 |
| #4 | 7/64 | 0.11 | 2.8 |
| #5 | 1/8 | 0.12 | 3.1 |
| #6 | 9/64 | 0.13 | 3.3 |
| #8 | 5/32 | 0.16 | 4.2 |
| #10 | 3/16 | 0.19 | 4.8 |
| #12 | 7/32 | 0.21 | 5.5 |
| #14 | 1/4 | 0.24 | 6.3 |
Largesteelfactory.com
Shanghai, China
Shanghai Iron and Steel Group will continue to adhere to the concept of innovative, green and high-quality development, continuously improve its core competitiveness, and contribute more to the progress and development of the global steel industry. The product range is complete, and it can produce ordinary and high-quality carbon structural steel plates, steel coils, round steel, steel bars, low-alloy high-strength structural steel plates, steel coils, round steel, steel bars, etc., which are widely used in shipbuilding, marine engineering, construction machinery, petrochemical, wind power, bridge construction, pressure vessels, molds and other fields.
