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Washer M16 DIN 125 A4 140 HV 17
Description
Flat Washer M16 DIN 125 A4 – Stainless Steel, Type A Plain
Flat Washer M16 DIN 125 A4 is a reliable fastening component manufactured from stainless steel grade A4. The ideal solution for installers seeking durable, corrosion-resistant components for both outdoor and indoor applications.
Why choose A4-80 steel? Grade A4 (AISI 316) contains molybdenum, which provides exceptional resistance to pitting and crevice corrosion – significantly superior to standard A2 steel. A hardness of 140 HV ensures high resistance to deformation and an even distribution of clamping forces.
When to choose A4-80 over A2-70? Stainless steel grade A4 is essential wherever contact with seawater, chlorides, acids or other aggressive media is present. It is the standard choice for photovoltaic installations in coastal zones, swimming pools, the chemical industry and food processing.
Compliance with DIN 125 means standardised dimensions and tolerances, ensuring full compatibility with M16 metric bolts and nuts. The washer is reusable and fits all standard M16 bolted connections.
Technical Specifications
- Standard: DIN 125 (equivalent to ISO 7089/7090)
- Size: M16
- Hole diameter (d1): 17.0 mm
- Material: stainless steel grade A4 (AISI 316)
- Hardness: 140 HV
- Type: flat washer
Applications
- Photovoltaic installations: securing mounting structures and fastening components exposed to corrosion, particularly in coastal zones with elevated environmental aggressiveness
- Steel structures: external and internal bolted connections in aggressive environments
- Mechanical engineering: machinery and equipment requiring high resistance to chemical agents
- Agriculture: equipment exposed to moisture, fertilisers and crop protection products
- Construction: façade and fixing elements in damp or contaminated environments
The role of a washer – it increases the bearing surface, protects the joined material from damage and prevents the connection from loosening. An essential component of every professional bolted joint.
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Technical data
| Thread type | M16 |
| Steel Grade | A4 |
| DIN | DIN 125 |