Flat Washer (DIN 125) Supplier
High-quality Carbon Steel Flat Washer (DIN 125). Standard flat washer with wide bearing surface. Size range M2-M64. Factory direct pricing with ISO 9001 certification.
Quick Specifications
Material
Carbon Steel
Type
Standard flat washer, wide bearing surface
Size Range
M2–M64
Surface Finish
Plain / Zinc-plated / Black / H.D.G
Grade
Grade 140HV
Product Overview
Flat washers (DIN 125) are essential fastener accessories designed to distribute the load of a bolt or screw head evenly across the surface being fastened. They provide a smooth bearing surface that protects component finishes and prevents damage during tightening.
Our carbon steel flat washers are manufactured to DIN 125 / ISO 7089 standards, ensuring precise dimensions and consistent quality. Available in sizes from M2 to M64, with multiple surface treatment options including plain, zinc plated, black oxide, and hot-dip galvanized for various environmental conditions.
All products comply with international standards including DIN 125, ISO 7089, and GB/T 97.1, ensuring reliable performance in demanding applications.
Dimensional Specifications
DIN 125 / ISO 7089 Standard – Carbon Steel Flat Washers
| Thread Size | Inner Dia. d (mm) | Outer Dia. D (mm) | Thickness s (mm) | Standard |
|---|---|---|---|---|
| M2 | 2.2 | 5 | 0.3 | DIN 125A |
| M3 | 3.2 | 7 | 0.5 | DIN 125A |
| M4 | 4.3 | 9 | 0.8 | DIN 125A |
| M5 | 5.3 | 10 | 1.0 | DIN 125A |
| M6 | 6.4 | 12 | 1.6 | DIN 125A |
| M8 | 8.4 | 16 | 1.6 | DIN 125A |
| M10 | 10.5 | 20 | 2.0 | DIN 125A |
| M12 | 13.0 | 24 | 2.5 | DIN 125A |
| M16 | 17.0 | 30 | 3.0 | DIN 125A |
| M20 | 21.0 | 37 | 3.0 | DIN 125A |
| M24 | 25.0 | 44 | 4.0 | DIN 125A |
| M30 | 31.0 | 56 | 4.0 | DIN 125A |
| M36 | 37.0 | 66 | 5.0 | DIN 125A |
Material Grades & Mechanical Properties
Carbon Steel Flat Washers – Mechanical Properties
| Grade | Hardness (HV) | Tensile Strength (MPa) | Surface | Applications |
|---|---|---|---|---|
| 140HV | 140 min | 300-500 | Plain / Zinc / Black | General purpose, light duty |
| 200HV | 200 min | 400-600 | Zinc-plated | Medium duty applications |
| 300HV | 300 min | 600-900 | Zinc-plated / H.D.G | High strength, structural |
Surface Treatment Options
Choose the right finish for your application environment
Plain / Black Oxide
Natural finish or black oxide coating for indoor applications. Economical choice for dry environments.
- Cost-effective
- Indoor use only
- Dry environments
Zinc Plated
Electro-zinc coating providing moderate corrosion resistance. Suitable for general outdoor use.
- Moderate corrosion resistance
- General outdoor applications
- Good appearance
Hot-Dip Galvanized (HDG)
Thick zinc coating for maximum corrosion protection. Ideal for harsh environments and marine applications.
- Maximum corrosion protection
- Harsh environments
- Marine applications
- Long service life
Applications
Construction Construction
Steel structures, bridges, buildings, concrete anchors
Machinery Machinery
Heavy equipment, industrial machines, manufacturing
Infrastructure Infrastructure
Railways, towers, pipelines, power transmission
Automotive Automotive
Vehicle assembly, chassis, engine components
Industrial Industrial
Factories, processing equipment, structural frames
Marine Marine
Ships, offshore platforms, coastal structures (HDG)
Quality Assurance
ISO 9001 Certified
Strict quality management system
Material Certificates
EN 10204 3.1 certificates available
100% Inspection
Dimensional and visual inspection
Professional Packaging
Carton, bag, pallet options
Need Flat Washers (DIN 125)?
Factory direct pricing, MOQ from 1 piece, fast delivery worldwide.