Trade Discount 20%
Locking Disc Spring Washer M18 | Spring Steel Hardened 420-510 HV | Zinc-Flake Coated | @Pack of 25 | by Wurth
Locking Disc Spring Washer M18 is engineered from spring steel hardened to 420-510 HV, ensuring robust performance in high-temperature applications. With a zinc-flake coating providing corrosion protection for up to 720 hours, this washer is perfect for mechanical assemblies and automotive use, offering reliable screw locking and minimal torque distribution.
Please sign in so that we can notify you about a reply
Sign in
Please login to continue to your account.
Product Name/Title: Locking Disc Spring Washer M18 | Spring Steel Hardened 420-510 HV | Zinc-Flake Coated | @Pack of 25 | by Wurth
Brand: Wurth
SKU: 40118
Alternatively Known As: Lock washer, spring lock washer, serrated lock washer, disc spring washer, M18 locking washer
Technical Specifications
- Suitable for screw thread: M18
- Internal diameter (d1): 18.5 mm
- Outer diameter (d2): 35 mm
- Height (h1): 4.2 mm
- Thickness (s1): 3 mm
- Material: Spring steel
- Vickers hardness: 420-510 HV
- Surface finish: Zinc-flake coated (silver)
- RoHS-compliant: Yes
- Corrosion protection period: 720 hours
- Form: M
- Locking device operating principle: Serrated lock washer
- Locking function: Embedding locking device
- Dimensions (H x L x W): 4.2mm x 35mm x 35mm
- Weight: 0.05 kg
Key Features
- Type M (medium) locking disc spring washer
- Spring steel hardened to 420-510 HV10
- Zinc-flake coated for corrosion protection up to 720 hours
- Friction locking via spring force and mechanical interlock by surface stamping
- Protects counter surface from damage by preventing washer rotation during installation
- Minimal tightening torque distribution
- Reusable and suitable for high temperature applications
Professional Installation Requirements
- Installation by a qualified technician or engineer is recommended to ensure proper torque and locking function.
Applications
- Suitable for screw connections of strength class 8.8 with normal head contact
- Used in mechanical assemblies requiring secure locking of screws
- Ideal for applications up to approximately 350°C
- Reusable locking washer for industrial and automotive use
Standards & Compliance
- Complies with AS/NZS 4801 – Occupational Health & Safety Management Systems for workplace safety
Environmental Benefits
- Reusable design reduces waste and replacement frequency
- Corrosion-resistant coating extends product life, reducing environmental impact
Warranty Information
Standard manufacturer warranty applies. Please refer to Wurth warranty policy for details.
Available Now
The Wurth Locking Disc Spring Washer M18 Zinc-Flake Coated 25 PCS is available for immediate purchase. Ideal for industrial, automotive, and mechanical fastening applications requiring secure screw locking.
