DIN125 Flat Washer
DIN 125 Flat Washers are designed to distribute the clamping load of bolts and nuts over a larger bearing area, helping reduce surface pressure and protect the connected material. Their simple flat and circular design makes them a versatile component for standard metric bolted connections.
DIN 125 Flat Washers can be supplied in carbon steel, alloy steel, and stainless steel, with different thicknesses and surface finishes to suit various mechanical and environmental requirements. Zinc plating and hot-dip galvanizing can provide additional corrosion protection for steel washers, while stainless steel options are suitable for applications where corrosion resistance is important. These washers are commonly used with bolts, screws, studs, and nuts in machinery, equipment, fabricated components, brackets, and general industrial assemblies. Selecting the correct washer size and thickness helps provide an appropriate bearing surface and ensures compatibility with the complete fastening assembly.
Specification:
DIN 125 Flat Washers are available in carbon steel and stainless steel with different hardness levels and surface treatments. The washer material and hardness can be selected according to the mating bolt grade, clamping load, and service environment. Higher-hardness steel washers provide greater resistance to deformation under high bolt preload, while stainless steel washers are preferred where corrosion resistance is important.
| Item | Specification |
|---|---|
| Standard | DIN125 |
| Washer Type | Flat Washer |
| Size Range | Φ1.5-Φ120 |
| Dimension Tolerance | DIN522 |
| Material | Carbon Steel,Alloy Steel,Stainless Steel |
| Surface Finish | Black Oxidation,Zinc Plated, HDG,Dacromet,Bright Finish,Passivation |
| Hardness | HV100,HV140,HV200,HV300 |
| Suface Condition | Free from Cracks,harmful burrs and defects |
| Inspection | Dimensions,Hardness,Material,Surface Finish |
Dimension Chart of DIN125 Flat Washer:
The DIN 125 dimension chart provides the key measurements required to select the correct flat washer for a metric bolt or screw. Inside diameter, outside diameter, and washer thickness determine thread clearance, bearing area, and the overall fit of the fastening assembly. The inside diameter is designed to provide sufficient clearance around the bolt thread, while the outside diameter provides the bearing surface needed to distribute the clamping load. Washer thickness can also be selected according to the required load distribution and available installation space.
| Thread Diameter | Φ1.6 | Φ2 | Φ2.4 | Φ2.5 | Φ2.6 | Φ3 | Φ3.5 | Φ4 | Φ5 | Φ6 | Φ7 | Φ8 | Φ10 | Φ12 |
| d min | 1.7 | 2.2 | 2.5 | 2.7 | 2.8 | 3.2 | 3.7 | 4.3 | 5.3 | 6.4 | 7.4 | 8.4 | 10.5 | 13 |
| d max | 1.84 | 2.34 | 2.64 | 2.84 | 2.94 | 3.38 | 3.88 | 4.48 | 5.48 | 6.62 | 7.62 | 8.62 | 10.77 | 13.27 |
| dc max | 4 | 5 | 6 | 6 | 7 | 7 | 8 | 9 | 10 | 12 | 14 | 16 | 20 | 24 |
| dc min | 3.7 | 4.7 | 5.7 | 5.7 | 6.64 | 6.64 | 7.64 | 8.64 | 9.64 | 11.57 | 13.57 | 15.57 | 19.48 | 23.48 |
| h max | 0.35 | 0.35 | 0.55 | 0.55 | 0.55 | 0.55 | 0.55 | 0.9 | 1.1 | 1.8 | 1.8 | 1.8 | 2.2 | 2.7 |
| h min | 0.25 | 0.25 | 0.45 | 0.45 | 0.45 | 0.45 | 0.45 | 0.7 | 0.9 | 1.4 | 1.4 | 1.4 | 1.8 | 2.3 |
| Thread Diameter | Φ14 | Φ16 | Φ18 | Φ20 | Φ22 | Φ24 | Φ26 | Φ27 | Φ28 | Φ30 | Φ32 | Φ33 | Φ35 | Φ36 |
| d min | 15 | 17 | 19 | 21 | 23 | 25 | 27 | 28 | 29 | 31 | 33 | 34 | 36 | 37 |
| d max | 15.27 | 17.27 | 19.33 | 21.33 | 23.33 | 25.33 | 27.33 | 28.33 | 29.33 | 31.39 | 33.62 | 34.62 | 36.62 | 37.62 |
| dc max | 28 | 30 | 34 | 37 | 39 | 44 | 50 | 50 | 50 | 56 | 60 | 60 | 66 | 66 |
| dc min | 27.48 | 29.48 | 33.38 | 36.38 | 38.38 | 43.38 | 49.38 | 49.38 | 49.38 | 55.26 | 58.8 | 58.8 | 64.8 | 64.8 |
| h max | 2.7 | 3.3 | 3.3 | 3.3 | 3.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 5.6 | 5.6 | 5.6 | 5.6 |
| h min | 2.3 | 2.7 | 2.7 | 2.7 | 2.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 4.4 | 4.4 | 4.4 | 4.4 |
- RELATED WASHER LISTS:
- DIN125 Flat Washer
- DIN127 Spring Lock Washer
- F436 Hardened Steel Washers
- DIN9021 Large Washer
- ASME/ANSI B 18.21.1 (USS) Flat Washer
- ASME/ANSI B 18.21.1 (SAE) Flat Washer
- ASME/ANSI B18.21.1 Helical Spring-Lock Washer
- DIN25201 Stainless Steel Double Fold Self-locking Washer
- DIN6797A Stainless Steel External Teeth Lock Washers
- Stainless Steel DIN6797J Internal Teeth Lock Washers
Application of DIN125 Flat Washer:
Machinery & Industrial Equipment
DIN 125 Flat Washers are widely used in machinery, industrial equipment, pumps, motors, and mechanical assemblies. The washer provides a larger bearing surface under the bolt head or nut, helping distribute clamping loads and reduce localized pressure on the connected component.
Steelwork & Fabricated Assemblies
These washers are suitable for steel frames, brackets, supports, mounting plates, fabricated components, and general structural assemblies. Different washer hardness levels can be selected according to the bolt grade and clamping load, while galvanized finishes provide additional corrosion protection for steel components.
Equipment Assembly & Maintenance
DIN 125 Flat Washers are commonly used in equipment installation, maintenance, repair, and replacement work. Their standardized metric dimensions make them easy to match with commonly used bolts, screws, studs, and nuts.
Outdoor & Corrosion-Resistant Applications
For outdoor, humid, or corrosive environments, hot-dip galvanized and zinc-plated carbon steel washers provide enhanced surface protection. A2 (304) and A4 (316) stainless steel washers are suitable where corrosion resistance and long-term service performance are more important.