Only for professionals

B 53085 

Hexagon self-locking screws
Material: Steel 8.8 | Surface: zinc-plated

Diameter (d)

Length (l)


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Böllhoff standard 53085 | Steel 8.8 | zinc plated | Cr (VI) - free | metric thread

The ratchet screws are a mechanical locking device that can prevent the connection from automatically loosening. The securing is achieved by the locking teeth, which penetrate into the support material when tightening. The material into which the screw is screwed must have a lower hardness than that of the screw. If the screw connection is loosened again, damage to the surface of the support material can be expected. If surface damage is to be avoided, we recommend the use of the RIPP LOCK® locking screws

• Screw locking without additional elements
• Enlarged bearing surface makes washers and lock washers superfluous
• Reduced setting values of the screws

technical details

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Application Joining by bolt, joining by screw
Cr(VI) Note Cr(VI)-free
Flange/washer with flange
Force application Hexagon head
Head shape Hexagonal head with flange
Installation method Screw into place with tool
Material Steel
Material version 8.8
Risk hydrogen embrittlement
RoHS conformal
Surface zinc-plated
Thread type Metric thread


You can download CAD-files from our catalog on partcommunity: To Böllhoff partcommunity
Title Language Version File Download
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
Data sheet: Technical information and dimensions of the product English 02/2022 130.91 KB / PDF

General questions:
Phone: +48 71 387 85 31

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