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B 53070 

Locking washers
Material: Spring steel | Surface: blackened

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Böllhoff standard 53070 | spring steel | blackened | Cr (VI) - free

Locking washers are retaining elements shaped like a cup spring. They have helical teeth on the upper and lower side. Placed under the head of the bolt or under the nut, the force is distributed over a larger area and preserves the surface of the component. Friction is optimized. By embossing the helical teeth into the mating part, a reliable form fit is achieved. Depending on the application, in addition to the preload force, the securing of the connection against automatic loosening is to be considered

• Optimized force connection
• Reliable form fit due to helical toothing
• Protection of the component surface

technical details

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Application Joining by bolt, joining by stud, joining by screw
Cr(VI) Note Cr(VI)-free
Form Round
Material Spring steel
Risk hydrogen embrittlement
RoHS conformal
Surface blackened


You can download CAD-files from our catalog on partcommunity: To Böllhoff partcommunity
Title Language Version File Download
Data sheet: Technical information and dimensions of the product English 02/2022 113.79 KB / PDF
Fastening and assembly technology: Products and services English 1180/21-V1-EN (WBH) 8.79 MB / PDF
Böllhoff bulletin: Changeover to Cr6+-free protective zinc layers for fasteners English 1622/15.02 894.98 KB / PDF

General questions:
Phone: +48 71 387 85 31

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