Heat Treated for Maximum Strength
Controlled heat treatment ensures consistent hardness above 300 HV while maintaining dimensional accuracy.
DIN 125 2A
Washers with a hardness from 300HV,Type A
- Standard: DIN 125 2A
- Material: Stainless Steel
- Size: 1.6-36
- Surface Treatment: Plain, Zinc Plated
- Min Order: 5000pcs
- Sample: Free sample (after quote)
- Delivery time: 30 – 45 Days
Product Overview
Product Application
DIN 125-2A Hardened Flat Washers (Form A) with a hardness of 300 HV or above are specifically designed for high-load fastening assemblies using Class 10.9 bolts and Class 10 nuts. Compared with standard 140HV or 200HV washers, these hardened washers offer significantly greater resistance to indentation, embedment, and deformation under high preload, helping maintain clamp force and joint integrity in demanding industrial environments. Their dimensions correspond to DIN 125A and are commonly supplied in accordance with ISO 7089 (300 HV).
Draw
Specification
DIN 125-2A 300HV vs DIN 9021 HV300
DIN 125-2A HV300
- Standard outside diameter
- Compact installation space
- Preferred for precision mechanical assemblies
DIN 9021 HV300
- Large outside diameter
- Better load distribution
- Suitable for oversized holes and soft materials
- Reduces pull-through risk on thin plates
DIN 125-2A 300HV vs Standard DIN 125 Washer
DIN 125-2A Hardened (≥300 HV)
- Designed for Grade 10.9 fasteners
- High resistance to embedment
- Suitable for heavy preload joints
- Better fatigue performance
- Excellent wear resistance
Standard DIN 125 (140–200 HV)
- Suitable for general-purpose fastening
- Recommended for Class 8.8 and below
- Lower manufacturing cost
- Not recommended for high preload applications
Product Advantages
Prevents Clamp Load Loss
The hardened bearing surface minimizes embedment relaxation, helping retain bolt preload over time.
Excellent Fatigue Resistance
Designed to withstand cyclic loading, vibration, and repeated tightening in demanding industrial environments.
Common Questions
What is the hardness of a DIN 125-2A hardened washer?
The hardened version has a minimum hardness of 300 HV, with typical values ranging between 300 HV and 400 HV after heat treatment.
Which bolt grades should use 300HV washers?
300 HV washers are recommended for Property Class 10.9 bolts and Class 10 nuts, where higher preload and bearing strength are required.
Is DIN 125A interchangeable with ISO 7089?
Yes. DIN 125A has largely been replaced by ISO 7089, and their dimensions are interchangeable in most applications.
Can you provide OEM manufacturing?
Yes. We offer customized dimensions, hardness requirements, coatings, laser marking, packaging, and private-label solutions.
