B 151

ZAHN self-locking screws

hexagonal head with flange and toothing
Flange/washer: with flange | Thread type: Metric thread | Head shape: Hexagonal head with flange | Force application: Hexagon head | Material: Steel | Installation method: Screw into place with tool | Surface: bright | Product group: Screws
Diameter (d)
M5
M6
M8
M10
M12
M16
Length (l)
8
10
12
14
16
18
20
22
25
30
35
40
45
50
55
70
Packingunit (pcs.)
25
50
100
200
500
Please select a version to see prices and availability.
Böllhoff standard 151 | Steel | Property class 90, from M12 Property class 100 | bright | Cr (VI) - free | metric thread

The ZAHN self-locking screws are mechanical anti-rotation devices that effectively prevent the automatic loosening of the connection. The reliable securing effect is achieved by the locking teeth, which penetrate into the support material by the depth of the tooth 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® self-locking screws.

Advantages:
• Reliable screw locking without additional elements
• Enlarged bearing surface makes washers and spring washers superfluous
• Reduced setting values of the screws
Cr(VI) Note:
Cr(VI)-free
Flange/washer:
with flange
Risk hydrogen embrittlement:
Thread type:
Metric thread
Head shape:
Hexagonal head with flange
Force application:
Hexagon head
Material:
Steel
Installation method:
Screw into place with tool
Surface:
bright
Application:
Joining by bolt, joining by screw
Product group:
Screws
RoHS conformal:
Material:
Steel
Fastening and assembly technology: Products and services
PDF
ENG
1180/21-V1-EN (WBH)
The Manual of fastening Technology: 8th edition
PDF
ENG
8100/23-V1-EN (WBH)
Böllhoff bulletin: Changeover to Cr6+-free protective zinc layers for fasteners
PDF
ENG
1622/15.02
Data sheet: Technical information and dimensions of the product
PDF
ENG
02/2024