Case Hardened Steel Custom Self Tapping Screw
Case hardened steel custom self tapping screw is a high-strength fastening solution designed for applications requiring excellent surface hardness, strong thread-forming capability, and cost-effective structural performance. The case hardened steel custom self tapping screw is widely used in automotive assemblies, machinery equipment, sheet metal structures, electrical enclosures, and OEM manufacturing systems where reliable self-threading performance is required.
Through carburizing (case hardening) treatment, the case hardened steel custom self tapping screw achieves a hard wear-resistant surface while maintaining a tough core, ensuring excellent torque resistance, wear resistance, and installation durability.
Product Overview
The case hardened steel custom self-tapping screw is engineered for direct thread forming in metal or plastic substrates without pre-tapping. Its hardened outer layer improves wear resistance during installation, while the tough core prevents brittle fracture.
This case hardened steel custom self tapping screw is especially suitable for high-volume industrial production where assembly efficiency and fastening reliability are critical. It supports customized head types, drive systems, and thread geometries according to OEM requirements.
As a widely used industrial fastener, it provides stable performance in automated assembly lines and mechanical fastening systems.
Product Specifications
| Item | Description |
|---|---|
| Product Name | Case Hardened Steel Custom Self-Tapping Screw |
| Material | Carbon Steel (Case Hardened / Carburized Steel) |
| Screw Type | Self-Tapping Screw |
| Surface Treatment | Carburized + Zinc Plated / Black Oxide / Custom |
| Head Type | Phillips / Torx / Hex / Custom |
| Drive Type | Cross / Torx / Internal Hex / Custom |
| Size Range | ST2.2–ST8.0 |
| Length Range | 4mm–80mm |
| Thread Type | Self-Tapping / Self-Drilling (custom available) |
| Hardness | Surface hardened (high wear resistance) |
| Packaging | Bulk / box / OEM packaging |
| Customization | Full OEM design support available |
Technical Parameters
| Parameter | Value |
|---|---|
| Core Strength | 400–800 MPa |
| Surface Hardness | HV 450–700 (case hardened layer) |
| Core Hardness | HV 200–300 |
| Density | 7.85 g/cm³ |
| Corrosion Resistance | Moderate to high (depending on coating) |
| Operating Temperature | -40°C to 150°C |
| Thread Performance | High torque resistance |
| Manufacturing Standard | ISO / DIN / OEM specification |
Materials and Manufacturing Process
The case hardened steel custom self-tapping screw is manufactured using precision forming and heat treatment processes to achieve a hard surface and tough core structure.
- Raw material selection: High-quality carbon steel wire rod
- Cold heading: Screw head and body forming
- Thread rolling: Precision self-tapping thread formation
- Carburizing (case hardening): Surface carbon diffusion treatment
- Quenching & tempering: Core strength stabilization
- Surface finishing: Zinc plating, black oxide, or custom coating
- Cleaning: Oil and residue removal
- Inspection: Dimensional, hardness, and torque testing
- Packaging: Industrial export-grade packaging
Each case hardened steel custom self-tapping screw is produced under strict process control for stable performance.
Applications of the Product
Case hardened steel self-tapping screws are widely used in:
- Automotive industry: Body panels and interior assemblies
- Machinery equipment: Sheet metal and structural fastening
- Electrical systems: Control cabinets and enclosures
- Construction: Lightweight metal structures
- Home appliances: Plastic and metal housings
- Industrial automation: Assembly line equipment
- HVAC systems: Ducting and equipment fastening
- OEM manufacturing: High-volume production systems
Their strong thread-forming ability makes them ideal for efficient assembly processes.
Why Choose This Product
- High surface hardness for excellent wear resistance
- Tough core structure prevents breakage
- Strong self-tapping performance in metal and plastic
- Suitable for automated assembly systems
- Customizable head and drive types available
- Cost-effective industrial fastening solution
- Stable torque performance under repeated use
- OEM/ODM customization support
- High production consistency for mass manufacturing
The case hardened steel custom self-tapping screw provides a reliable balance of strength, durability, and cost efficiency.
Why Choose Flybear
Flybear is a professional manufacturer specializing in industrial fasteners and OEM custom engineering solutions.
- Advanced cold heading and heat treatment production lines
- Carburizing and surface engineering expertise
- OEM customization for industrial applications
- Strict quality inspection and testing systems
- Stable mass production capability
- Global export experience in fastener manufacturing
Flybear supports automotive, machinery, electronics, and construction industries with reliable fastening solutions.
Quality Inspection and Control
Strict quality control ensures stable performance:
- Raw material chemical composition testing
- Case depth and hardness testing
- Thread accuracy inspection
- Torque resistance testing
- Dimensional measurement
- Surface coating inspection
- Installation performance testing
- Packaging quality verification
All production follows ISO quality management standards.
Selection Guide
When selecting case hardened steel self-tapping screws, consider:
- Substrate material (metal or plastic)
- Required hardness and torque level
- Screw size and thread type
- Corrosion environment conditions
- Installation method (manual or automated)
- Coating requirements
Proper selection ensures optimal fastening performance.
FAQ
1. What is case hardened steel?
It is steel with a hard outer layer and tough inner core formed by carburizing.
2. Why use self-tapping screws?
They create threads directly without pre-drilling tapping operations.
3. Is case hardened steel strong?
Yes, it offers high surface hardness and good core toughness.
4. Can it be used in automation assembly?
Yes, it is widely used in automated production lines.
5. Can custom designs be made?
Yes, Flybear supports full OEM customization.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
Contact us for quotation, customization, and technical support via Contact Us.
