Flat Washers
Flat Washers are thin, circular metal discs designed to distribute the load of a fastener, prevent surface damage, and enhance joint stability. These washers are widely used in construction, automotive, industrial machinery, and precision engineering where even pressure distribution is crucial to preventing loosening or structural failure.
At Rajal Industries, we manufacture precision-engineered Flat Washers conforming to ISO, ASME, and DIN standards, ensuring high-strength performance, corrosion resistance, and compatibility with various bolt and nut sizes.
Sizes & Standards
| Size Range | Standards |
|---|---|
| Metric: M1.6 to M100 | ISO 7089 – Standard for flat washers in metric fasteners |
| Imperial: 1/4" to 1-1/2" | ASME B18.22.1 – U.S. standard for general-purpose flat washers |
| DIN 125 – German standard for standard-duty flat washers |
Material & Strength Grades
| Material Type | Available Strength Grades | Industry Standards |
|---|---|---|
| Carbon Steel & Hardened Steel | Class 5.8, 8.8, 10.9 | ISO 7089, DIN 125, ASME B18.22.1 |
| Stainless Steel (Corrosion Resistant) | A2-70 (SS 304), A4-80 (SS 316) | ISO 3506, ISO 7089 |
| Hardened & Heat-Treated Steel | Class 8.8, 10.9, 12.9 | DIN 125, ISO 7089 |
| Aluminum & Brass (Non-Corrosive & Lightweight Applications) | Custom Hardness Ratings | ISO 7089, ASME B18.22.1 |
- Heat-Treated for Maximum Strength & Wear Resistance –Flat washers undergo hardening and surface treatment to enhance durability and load-bearing capacity.
- Load Ratings Based on Material & Application:
- Carbon Steel Class 8.8 Flat Washer: 800-900 MPa tensile strength
- Stainless Steel A4-80 Flat Washer: 700-800 MPa corrosion-resistant strength
Flat Washer Design & Engineering Features
Uniform Load Distribution for Enhanced Joint Strength
- Prevents localized stress concentration and material deformation under high bolt tension.
Improves joint longevity by evenly spreading force across the fastened surface.
Surface Protection for Damage-Free Fastening
- Acts as a buffer between fasteners and materials, reducing friction and wear.
Protects painted, coated, or delicate surfaces from damage during tightening.
Vibration Resistance for Secure Fastening
- Helps reduce loosening in dynamic load conditions such as automotive, machinery, and rail applications.
Compatible with locking nuts and anti-vibration fasteners.
Corrosion-Resistant Coatings for Long-Term Performance
- Available in zinc-plated, hot-dip galvanized, and stainless steel finishes.
Ensures protection against rust, chemicals, and extreme weather conditions.
Multiple Variants for Specific Industrial Applications
- Standard Flat Washers (DIN 125, ISO 7089) – For general-purpose fastening.
Hardened & Heat-Treated Flat Washers – For high-stress, load-bearing applications.
Large Diameter Flat Washers – For soft materials and oversized hole reinforcement.
Narrow Flat Washers (DIN 433) – For space-constrained assemblies.
Thread Specifications & Precision Engineering
| Feature | Description | Application |
|---|---|---|
| Standard Flat Washers (DIN 125, ISO 7089) | Ensures even load distribution & joint protection | Automotive, construction, general fastening |
| Hardened Steel Flat Washers | Designed for high-load, high-stress applications | Structural engineering, industrial equipment |
| Large Diameter Flat Washers | Provides support in oversized bolt holes | Railways, heavy machinery |
| Corrosion-Resistant Stainless Steel Flat Washers | Ensures long-lasting durability in marine & chemical environments | Marine, offshore, food processing |
Thread Fitment & Compliance
- Metric flat washers conform to ISO 7089 & DIN 125 tolerances, ensuring perfect fit with metric fasteners.
- Imperial flat washers meet ASME B18.22.1 standards for universal compatibility.
Common Applications of Flat Washers
- Construction & Infrastructure – Used in steel structures, bridges, and load-bearing assemblies.
- Automotive & Heavy Vehicles – Ensures secure fastening in suspension systems, engine mounts, and chassis.
- Industrial Machinery & Heavy Equipment – Provides joint reinforcement in high-load applications.
- Marine & Offshore Engineering – Used in shipbuilding, docks, and marine hardware to prevent corrosion.
- Electronics & Electrical Equipment – Protects circuit boards and delicate enclosures from over-tightening.
Why Choose Rajal Industries for Flat Washers?
Manufactured to International Standards
Ensuring precision engineering, strength, and compliance.
High-Strength & Load-Bearing Design
Engineered for heavy-duty fastening applications.
Customizable Variants Available
Offering hardened, stainless steel, and large-diameter flat washers.
Bulk & Custom Orders
Ideal for construction, automotive, and industrial applications.
Stringent Quality Control
Each batch undergoes hardness testing, dimensional accuracy verification, and corrosion resistance assessment.
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Our Offices
C-204, Vaibhav Platina, Nr. Kaveri Trishra, S P Ring road, Shilaj, Ahmedabad, Gujarat-380054
Call us
+91-846 036 2030
Email Us
rajalfast@gmail.com sales@rajalindustries.com