Stainless Steel Custom Combined Screw (Assembly Screw / Captive Screw Set)
Stainless steel custom combined screw is a high-reliability fastening solution designed for applications requiring integrated washer-nut-screw assemblies, anti-loss structure, and efficient automated installation. The stainless steel custom combined screw is widely used in electrical enclosures, machinery equipment, automotive assemblies, telecommunications systems, and OEM manufacturing where fast assembly speed and stable fastening performance are required.
A combined screw typically integrates a screw with flat washer, spring washer, or captive components, reducing assembly steps and improving installation efficiency.
Product Overview
The stainless steel custom combined screw is engineered to simplify assembly processes by integrating multiple fastening elements into a single pre-assembled unit. This structure prevents missing parts, improves assembly consistency, and enhances production efficiency.
This stainless steel custom combined screw is especially suitable for automated production lines and high-volume OEM manufacturing. Stainless steel material ensures excellent corrosion resistance and long service life even in harsh environments.
As a premium industrial fastener, it is widely used in precision equipment and modular assembly systems.
Product Specifications
| Item | Description |
|---|---|
| Product Name | Stainless Steel Custom Combined Screw |
| Material | Stainless Steel (A2 / A4 optional) |
| Structure Type | Screw + Washer / Spring Washer / Captive Set |
| Head Type | Hex / Socket / Pan / Custom |
| Drive Type | Phillips / Internal Hex / Torx |
| Size Range | M2–M16 |
| Length Range | 4mm–120mm |
| Surface Finish | Plain / Passivated / Polished |
| Corrosion Resistance | High (A4 better for marine use) |
| Thread Type | Metric Machine Thread |
| Packaging | Bulk / tray / OEM automated packaging |
| Customization | Full assembly design available |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | 500–800 MPa (A2 stainless) |
| Yield Strength | 200–600 MPa |
| Hardness | HV 150–300 |
| Density | 7.93 g/cm³ |
| Corrosion Resistance | High (A4 superior in seawater) |
| Operating Temperature | -50°C to 400°C |
| Thread Tolerance | 6g / 6H standard |
| Manufacturing Standard | ISO / DIN / OEM specification |
Materials and Manufacturing Process
The stainless steel custom combined screw is manufactured through precision assembly and machining processes to ensure stability and consistent performance.
- Raw material selection: Stainless steel wire (A2 / A4)
- Cold heading: Formation of screw head and shank
- Thread rolling: High-precision thread forming
- Washer assembly: Flat washer / spring washer pre-installation
- Captive forming: Anti-loss structural design (optional)
- Surface treatment: Passivation or polishing
- Cleaning: Oil-free treatment for precision assembly
- Inspection: Dimensional and functional testing
- Packaging: Automated assembly-ready packaging
Each stainless steel custom combined screw is designed to ensure reliable performance in automated assembly systems.
Applications of the Product
Stainless steel combined screws are widely used in:
- Electrical enclosures: Control cabinets and switchgear
- Automotive industry: Interior and structural assemblies
- Telecommunications: Server racks and communication equipment
- Industrial machinery: Modular equipment assembly
- Home appliances: Housing and structural fastening
- HVAC systems: Equipment panels and covers
- Medical devices: Precision assembly systems
- OEM manufacturing: Automated production lines
Their integrated design improves efficiency and reduces assembly errors.
Why Choose This Product
- Integrated washer-screw structure reduces assembly steps
- Prevents missing parts in production lines
- Improves installation efficiency and consistency
- Excellent corrosion resistance with stainless steel
- Compatible with automated assembly systems
- Customizable combined structures available
- Suitable for high-volume OEM production
- Stable performance in vibration environments
- A2/A4 stainless steel options available
The stainless steel custom combined screw enhances production efficiency and fastening reliability.
Why Choose Flybear
Flybear is a professional manufacturer specializing in custom fastening systems and OEM industrial solutions.
- Advanced cold heading and assembly production lines
- Stainless steel fastening system expertise
- OEM/ODM customization for combined fasteners
- Strict quality inspection and automation compatibility testing
- Global export experience in industrial fasteners
- Engineering support for assembly optimization
Flybear provides efficient fastening solutions for electronics, automotive, machinery, and industrial manufacturing industries.
Quality Inspection and Control
Strict quality control ensures consistent product performance:
- Raw material chemical composition testing
- Dimensional accuracy inspection
- Assembly integrity testing
- Torque performance testing
- Washer retention force testing
- Corrosion resistance testing (salt spray)
- Thread gauge verification
- Packaging inspection for automation use
All production follows ISO quality management standards.
Selection Guide
When selecting stainless steel custom combined screws, consider:
- Assembly type (washer, spring washer, captive design)
- Stainless steel grade (A2 / A4)
- Load and torque requirements
- Environmental corrosion level
- Automation assembly compatibility
- Size and thread specification
Proper selection ensures stable and efficient assembly performance.
FAQ
1. What is a combined screw?
It is a screw with pre-assembled washers or components for easier installation.
2. What is its main advantage?
It reduces assembly time and prevents missing parts.
3. Can it be customized?
Yes, Flybear supports full OEM customization.
4. Is stainless steel suitable for outdoor use?
Yes, especially A4 stainless steel for marine environments.
5. Is it suitable for automation lines?
Yes, it is widely used in automated assembly systems.
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.
