F436 38-45HRC Carbon Steel Plain Washer
Product Overview
The F436 Carbon Steel Plain Washer is a high-performance flat washer commonly used in structural fastening applications due to its exceptional hardness, strength, and dimensional stability. Designed to fit under bolt heads or nuts, these plain washers distribute the load evenly, provide insulation, and prevent damage to assembled components. With a Rockwell hardness range of 38-45 HRC, these washers are engineered for environments requiring high compressive strength and resistance to deformation under heavy loads.
At Flybear Fastener, we manufacture and supply premium-grade F436 washers tailored to the rigorous demands of industrial, construction, and infrastructure sectors.
Product Specifications
| Specification | Details |
|---|---|
| Product Name | F436 Carbon Steel Plain Washer |
| Hardness | Rockwell HRC 38-45 |
| Material | Carbon Steel |
| Diameter Range | M12 – M36 / 1/2″ – 1-1/2″ |
| Thickness | As per F436 / DIN / ANSI Std |
| Surface Finish | Plain / Zinc-Plated / Black Oxide |
| Standard | ASTM F436 / ANSI B18.22.1 |
| Packaging | Bulk / OEM Custom Packaging |
Technical Parameters
| Parameter | Specification |
|---|---|
| Strength Grade | 8.8, 10.9, 12.9 optional for bolts |
| Surface Treatments | Zinc plated, Black oxide, Dacromet |
| Standard Compliance | ASTM F436, ANSI B18.22.1, RoHS, CE |
| Corrosion Resistance | High (Varies by surface finish) |
| Operating Temp | -50°C to +300°C |
Materials & Manufacturing Process
Our F436 washers are produced using high-quality carbon steel to ensure consistent performance, resilience, and mechanical integrity. Here is a brief on our process:
Common Materials Used:
- High-grade Carbon Steel: Excellent strength-to-weight ratio and affordability
- Available finishes to enhance corrosion resistance
Manufacturing Workflow:
Raw Material → Cold/Hot Forming → Heat Treatment (HRC 38-45) → Surface Finishing → Precision Inspection → Custom Packaging
The heat treatment is a critical stage, accurately achieving the specified Rockwell hardness. Surface finishes like zinc plating and Dacromet coatings offer extended corrosion protection.
Common Applications & Industries
F436 carbon steel washers are widely utilized across various high-demand applications, including:
- Structural Steel Assemblies
- Highway and Bridge Construction
- Wind Power Installations
- Heavy Duty Equipment Fastening
- Mining and Tunnel Engineering
- Infrastructure Development Projects
- Offshore Platforms and Marine Hardware
Their hardness and durability make them ideal for use with high-strength bolts and nuts in demanding applications where superior load distribution is essential.
Competitive Advantages of Our F436 Washers
At Flybear Fastener, our washers stand out due to:
1. Premium Materials:
Use of rigorously selected carbon steel ensures excellent load-bearing performance.
2. Precision Engineering:
Every washer is machined to optimal flatness and tolerance, ensuring consistent compression control.
3. Advanced Surface Treatment:
Zinc plating, Dacromet, and oxide finishes provide excellent rust and corrosion resistance.
4. Customization Services:
We can manufacture washers based on customer-provided drawings or samples, meeting diverse project needs.
5. Reliable Supply Chain:
With extensive inventory and efficient logistics, we ensure quick delivery and stable stocking.
6. Responsive Support:
Customers value our attentive after-sales support and timely technical assistance.
Quality Inspection & Control Process
Our manufacturing facilities follow strict quality control measures to ensure product excellence throughout production. Key inspection and quality assurance processes include:
- Thread and Dimensional Accuracy via Go/No-Go Gauges
- Hardness and Tensile Testing (HRC/Torque Resistance)
- Salt Spray Corrosion Testing (Varying Hours Based on Finish)
- Visual & Microscopic Defect Analysis
- Optical Sorting and Automated Screening
- Material Composition Verification via Spectrometer
We proudly hold ISO 9001 and IATF16949 certifications, adhering to the most stringent international standards.
Washer Selection & Procurement Guide
When choosing the right F436 washer, consider:
- Bolt Compatibility: Ensure the washer fits the bolt/nut specified by your standard.
- Hardness Requirement: Match HRC specs for structural strength.
- Finish Type: Choose surface finish based on environmental exposure (e.g., zinc for general use, Dacromet for marine).
- Standards Compliance: Match ASTM F436 or ANSI B18.22.1 for project certification needs.
- Order Volume & Lead Time: Contact us for bulk pricing and shipping details.
Final Thoughts & Company Vision
At Flybear Fastener, we are committed to delivering superior quality fastener products with precision, durability, and reliability. Our experience with industrial-grade component manufacturing ensures all customer expectations are not only met but exceeded.
We provide end-to-end solutions — from design consultation to logistical fulfillment — tailored to your project’s unique needs. If you’re seeking a trusted partner in fastening components, feel free to contact us to request a quote, explore custom manufacturing options, or inquire about our industry capabilities.
We always uphold the principle of “Quality First, Customer Foremost,” striving to be your one-stop source for industrial fastening excellence.
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