Electrical Lockout Tagout and Accessories Blog
Posted on 29-06-2026

Shakeproof washers have the unique feature of serrations on internal surfaces, they are also known as Serrated Washers or Vibration Proof washers.
Standard: DIN9797J
Material: Steel
Finish: BZP
Size: M20
Inner Diameter: 21mm
Outer Diameter: 33mm
Thickness: 1.4mm
Minimum Number of Teeth: 12
No detailed specifications are available for this product.
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Walk around any major trade show and you'll quickly discover which products genuinely capture attention and which ones simply blend into the background. At ELEX 2026, one fixing solution consistently drew crowds, questions, and repeat demonstrations: K9SCREWS.