Stainless Steel Hex Head Drilling Screws with Collar
Product Overview
Hex head drilling screws with collar are self-drilling fasteners commonly used in structural and industrial assembly applications. Designed to fasten different materials like metal to metal or metal to wood, these screws eliminate the need for pre-drilling holes, thus enhancing assembly speed and labor efficiency. The hexagonal head allows for high torque application using standard tools, while the added collar provides enhanced bearing surface and pull-through resistance. Known for their robustness and easy installation, these screws are ideal for environments where strength, corrosion resistance, and a secure fit are essential.
At Flybear Fastener, we specialize in high-grade stainless steel hex head drilling screws with collar, produced to meet and exceed international standards.
Product Specifications Table
| Parameter | Specification |
|---|---|
| Product Name | Hex Head Drilling Screws with Collar |
| Head Type | Hex Head |
| Drive Style | Hex Washer |
| Material | Stainless Steel (A2, A4) |
| Collar Type | Fixed Collar |
| Self-Drilling Tip | Type 17 / Type S / Modified |
| Thread Type | Full Thread or Partial Thread |
| Length Range | 9.5mm to 50mm |
| Diameter | ST2.9, ST3.5, ST4.2, ST4.8, ST5.5, ST6.3 |
| Finish/Coating | Plain, Passivated, or Custom Coating |
| Standards | DIN 7504-K, ISO 15480 |
Technical Parameters Table
| Metric | Value |
|---|---|
| Tensile Strength | Up to 800N/mm² (A2 Stainless) |
| Shear Strength | 620N/mm² – 700N/mm² |
| Hardness | HV 350 – 450 |
| Corrosion Resistance | ASTM B117 ≥ 500H (for coated) |
| Thread Pitch Tolerance | ±6g |
| Drill Capacity | Up to 5mm steel sheet |
Stainless Steel Material & Manufacturing Process
Hex head drilling screws with collar are manufactured using high-quality A2 or A4 grade stainless steel — known for excellent corrosion resistance, mechanical strength, and durability. The A4 variant offers superior performance in saltwater and outdoor environments.
Our production process involves:
- Cold heading to form the hexagonal head.
- Machining of the collar and threads with tight tolerance control.
- Heat treatment to improve mechanical properties.
- Roll forming of threads to ensure uniform engagement.
- Surface cleaning and optional passivation or coating.
Integrated quality checks at every stage ensure that Flybear Fastener products meet global performance and safety standards.
Typical Industries and Application Scenarios
Our hex head drilling screws with collar are widely used in various industries:
- Steel structure construction (roofing & cladding)
- HVAC and mechanical assembly
- Electrical enclosures and cabinets
- Automotive aftermarket services
- Industrial shelving and racking systems
- Prefabricated metal buildings
Their strength and corrosion resistance make them ideal for both interior and exterior applications, especially in high-moisture or corrosive environments.
Core Advantages of Hex Head Drilling Screws with Collar
Superior Stainless Steel Construction
Manufactured from A2/A4 stainless steel, these fasteners resist rust, oxidation, and chemical corrosion, ensuring longevity in demanding settings.
Precision Engineering
Tight thread tolerances and collar dimensions ensure secure fastening, reduce vibration, and eliminate risks of over-tightening or stripping.
Advanced Surface Treatment
Optional custom coatings enhance appearance and corrosion protection. Passivation treatments extend life in marine and industrial environments.
Flexible Customization
We offer fastener customization based on drawings, prototypes, or samples. Diameter, thread type, collar size, and drill tip design can be specified.
Reliable Supply Chain
With robust inventory and smart logistics, Flybear Fastener ensures timely delivery regardless of order size.
After-Sales Support
We provide full documentation, installation guidance, and responsive technical support for your fastening needs.
Strict Quality Control and Testing by Flybear Fastener
Each batch of products undergoes rigorous testing, including:
- Dimensional accuracy checks
- Salt spray corrosion resistance (ASTM B117 method)
- Mechanical strength testing (tensile, shear, hardness)
- Thread fit inspections using gauge tools
Flybear Fastener is ISO 9001 certified and applies lean manufacturing and Six Sigma methodologies to maintain the highest quality level.
Hex Head Drilling Screws with Collar Selection & Buying Guide
When selecting hex head drilling screws with collar, consider the following:
- Substrate material (steel, aluminum, wood)
- Required corrosion resistance
- Load-bearing capacity and length
- Drill tip size (based on penetration depth)
- Environmental conditions (exterior vs. interior)
You may also consult stainless steel standards like ISO 3506 to ensure compliance with strength and corrosion resistance needs. Contact us for catalog downloads, samples, and technical guidance to match the right fastener to your application.
Conclusion & Company Promotion
In conclusion, hex head drilling screws with collar offer unmatched convenience, reliability, and durability for structural and industrial applications, especially when stainless steel performance is required. Their integrated collar boosts fastening power, and the self-drilling tip saves time in installation. Precision manufacturing and high-grade material options make them a go-to choice for contractors and manufacturers alike.
We always adhere to the principle of “Quality First, Customer Supreme”, striving to provide our clients with high-quality fastener products and one-stop solutions for all fastening needs. Explore our website to discover the full range of products or contact us for industry-specific solutions and competitive quotations tailored to your business needs.
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