Screws
What are Screws?
Screws are externally threaded fasteners designed to be inserted into materials using torque, often without needing a nut. Used for joining wood, metal, plastic, or composites, screws provide both clamping force and resistance to loosening due to their helical thread. Available in a wide range of head styles, drive types, and materials, screws are essential across industries such as furniture, automotive, construction, and electronics.
Key Features
- Self-Tapping or Pre-Threaded Options – Designed for direct installation or pre-tapped holes.
- Multiple Head & Drive Types – Phillips, slotted, hex, Torx, and more.
- Material Flexibility – Carbon steel, alloy steel, brass, aluminum, and coated options.
- Precision Threads – For tight, vibration-resistant grip.
- Versatile Applications – For wood, metal, plastic, and composite assemblies.
Types of Screws
- Wood Screws
- Machine Screws
- Self-Tapping Screws
- Self-Drilling Screws
- Sheet Metal Screws
- Socket Head Screws
- Countersunk Screws
Specifications
Mechanical Properties
Chemical Composition
Equivalent Grades
Weight Chart
Specifications
| Parameter | Specification |
|---|---|
| Size Range | M2 to M24 |
| Drive Types | Slotted, Phillips, Hex, Torx, Allen |
| Thread Types | Metric, UNC, UNF |
| Standards | DIN 7981 / 7982 / 912, ISO, JIS, ASTM |
| Material Options | Carbon Steel, Alloy Steel, Brass, Stainless |
| Finishes | Zinc, Chrome, Black Oxide, Nickel Plated |
| Property | Value |
|---|---|
| Tensile Strength | 400 – 1000 MPa |
| Hardness | 120 – 350 HB |
| Torque Resistance | High (grade-specific) |
| Elongation | 10% – 25% |
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 – 0.50 |
| Manganese (Mn) | 0.60 – 2.00 |
| Silicon (Si) | 0.10 – 1.00 |
| Chromium (Cr) | 18.0 – 20.0 (SS Only) |
| Nickel (Ni) | 8.0 – 10.5 (SS Only) |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.050 |
| Iron (Fe) | Balance |
| Standard | Equivalent Grade |
|---|---|
| ASTM | A574 / A307 |
| DIN | 912 / 7981 |
| ISO | 4762 / 14583 |
| JIS | B1111 |
| Screw Size | Type | Weight (kg) |
|---|---|---|
| M4 x 10 mm | Machine Screw | 0.45 |
| M5 x 20 mm | Self-Tapping Screw | 0.80 |
| M6 x 25 mm | Socket Head Screw | 1.30 |
Applications of Screws
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What is the difference between a machine screw and a self-tapping screw?
Machine screws are used in pre-threaded holes or with nuts, while self-tapping screws cut their own thread into materials during installation.
Do you offer corrosion-resistant screw coatings?
Yes, we offer zinc-plated, chrome-plated, nickel-coated, and black oxide finishes for protection against rust and wear.
Can screws be ordered in bulk or project-specific kits?
Absolutely. We offer bulk packaging and customized screw kits tailored to assembly lines or industrial project needs.
Do your screws meet international standards?
Yes, all our screws conform to DIN, ASTM, ISO, and JIS standards for global compatibility and quality assurance.
