Spring Washers
What are Spring Washers?
Spring washers, also known as disc springs, are resilient fasteners designed to provide preload between two surfaces and absorb shock, vibration, and thermal expansion. These washers are ideal for applications where bolted joints are subject to dynamic loads, ensuring a secure and tight assembly over time.
Asiad Steel Industries is a trusted manufacturer, supplier, and exporter of premium Spring Washers in various sizes, grades, and finishes. Designed to provide reliable tension and secure fastening in bolted assemblies, our spring washers are ideal for automotive, industrial, and construction applications.
Key Features
Load
Distribution
Durable
Construction
Easy Installation
& Removal
Wide
Compatibility
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Size | M2 to M100 (custom sizes available) |
| Pressure Ratings | ANSI / ASME Class | Class 150, 300, 600, 900, 1500, 2500 |
| PN Ratings | PN6, PN10, PN16, PN25, PN40, PN64 | |
| Product Types | Spring Washers | Split Lock Washer, Conical (Belleville) Washer, Wave Washer |
| Material Options | Stainless Steel Grades | SS 304, SS 316, SS 410 |
| Carbon Steel Grades | C60, C75, C100 (hardened & tempered) | |
| Standards & Certifications | ASTM | ASTM F436, ASTM A684, ASTM B159 |
| ASME / ANSI | ASME B18.21.1 | |
| European Standards | DIN 127, DIN 7980, DIN 2093 (for disc springs) | |
| Certifications | ISO 9001, PED 2014/68/EU, RoHS, NACE MR0175 | |
| Design Features | Thickness | As per DIN / ASTM / ANSI standards, customized options available |
| Inner & Outer Diameter | Standard & oversized options for special assemblies | |
| Tolerance | As per ISO / DIN / ASME standards | |
| Coating & Surface Finish | Anti-Corrosion Coating | Zinc Plated, Galvanized, Phosphate Coating |
| Optional Coatings | PTFE, Black Oxide, Geomet, Xylan | |
| Surface Finish | Smooth, Polished, Bead Blasted | |
| Testing & Inspection | Load Testing | Proof load & compression tests as per DIN 2093 |
| Non-Destructive Testing | Ultrasonic (UT), Magnetic Particle Testing (MPT) | |
| Destructive Testing | Hardness, Shear, Fatigue, Salt Spray (for coatings) |
Dimensions
| Nominal Size (Bolt) | Outer Diameter (OD) | Inner Diameter (ID) | Thickness | Free Height / Deflection | Standard |
|---|---|---|---|---|---|
| M3 | 6.0 mm | 3.0 mm | 0.5 mm | 1.0 mm | DIN 127 |
| M4 | 8.0 mm | 4.3 mm | 0.8 mm | 1.2 mm | DIN 127 |
| M5 | 10.0 mm | 5.3 mm | 1.0 mm | 1.5 mm | DIN 127 |
| M6 | 12.0 mm | 6.4 mm | 1.6 mm | 1.8 mm | DIN 127 |
| M8 | 16.0 mm | 8.4 mm | 1.6 mm | 2.0 mm | DIN 127 |
| M10 | 20.0 mm | 10.5 mm | 2.0 mm | 2.5 mm | DIN 127 |
| M12 | 24.0 mm | 13.0 mm | 2.5 mm | 3.0 mm | DIN 127 |
| M16 | 30.0 mm | 17.0 mm | 3.0 mm | 3.5 mm | DIN 127 |
| M20 | 37.0 mm | 21.0 mm | 4.0 mm | 4.0 mm | DIN 127 |
| M24 | 44.0 mm | 25.0 mm | 5.0 mm | 4.5 mm | DIN 127 |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 350 – 800 | MPa (Carbon Steel, Stainless Steel, Alloy Steel) |
| Yield Strength | 180 – 450 | MPa |
| Hardness | 150 – 350 | HB (Brinell) |
| Elongation | ≥ 15 – 25 | % |
| Density | 7.8 – 8.0 | g/cm³ |
| Impact Toughness | ≥ 20 – 60 | J (Charpy, grade-dependent) |
| Modulus of Elasticity (E) | ~200 | GPa |
| Fatigue Strength | 200 – 400 | MPa |
| Corrosion Resistance | Good to Excellent | SS > CS > Alloy Steel |
| Thermal Conductivity | 15 – 50 | W/m·K |
| Coefficient of Thermal Expansion | 10 – 18 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.40 – 0.65 | – |
| Poisson’s Ratio | 0.27 – 0.30 | – |
| Brinell Hardness Range | 150 – 350 | HB |
| Surface Finish | Plain / Zinc Plated / Black Oxide | – |
| Operating Temperature Range | -40 to 500 | °C (material-dependent) |
| Standard / Specification | DIN 127 / ISO 7089 / ANSI B18.21.1 | – |
Chemical Composition
| Element | SS 304 (%) | SS 304L (%) | SS 316 (%) | SS 316L (%) |
|---|---|---|---|---|
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 8.0 – 10.5 | 8.0 – 12.0 | 10.0 – 14.0 | 10.0 – 14.0 |
| Carbon (C) | ≤ 0.08 | ≤ 0.03 | ≤ 0.08 | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
| Molybdenum (Mo) | — | — | 2.0 – 3.0 | 2.0 – 3.0 |
Applications of Spring Washers
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What is a spring washer used for?
Are stainless steel spring washers rust-proof?
Which type of spring washer is suitable for high-load conditions?
Can I request custom sizes or coatings?
