B 251

RIPP LOCK® self-locking screws

cylinder head with flange | hexagon socket
Flange/washer: with flange | Thread type: Metric thread | Head shape: Cylinder head with flange | Force application: Hexagon socket | Material: Steel | Installation method: Screw into place with tool | Surface: zinc-plated | Product group: Screws
Diameter (d)
M5
M6
M8
M10
M12
Length (l)
10
12
16
20
25
30
35
40
45
50
Packingunit (pcs.)
100
200
500
Reset selection
For further information please contact us.
Art.no.: W251100VZ820
Art.no.: W251100VZ820
Böllhoff standard 251 | Steel | Strength class 100 | zinc-plated | Cr (VI) - free | metric thread

The RIPP LOCK® self-locking screws are reliable fasteners for securing screw connections against loosening. The preload force is maintained even under high dynamic loads. With RIPP LOCK®, the screws have a special mechanical securing effect against automatic loosening of the connection. This is created by radial ribs that act on the component over the entire contact surface. During assembly, the radial ribs are impressed into the respective mating part by the applied preload force. The resulting form fit prevents the connection from turning loose. Additional safety devices, washers and lock washers are not required. The component surface of even sensitive materials is protected.

Advantages:
• Reliable anti-rotation device
• Preservation of the preload force even under high dynamic loads
• Saves washers, spring washers or other additional safety devices
a max.:
3,75
b:
28
Diameter (d):
M8
d2 max.:
9,4
d2 min.:
9,2
dc max.:
17
dc min.:
16
dk max.:
14
dk min.:
13
e min.:
6,86
k max.:
8
k min.:
7,64
Length (l):
20
l max. A:
20,42
l min. A:
19,58
Pitch (P):
1,25
s:
6
s max.:
6,14
s min.:
6,02
Packingunit (pcs.):
200
Tool size:
SW 6
Cr(VI) Note:
Cr(VI)-free
Flange/washer:
with flange
Risk hydrogen embrittlement:
Thread type:
Metric thread
Head shape:
Cylinder head with flange
Force application:
Hexagon socket
Material:
Steel
Installation method:
Screw into place with tool
Surface:
zinc-plated
Application:
Joining by bolt, joining by screw
Product group:
Screws
RoHS conformal:
Material:
Steel
Data sheet: Technical information and dimensions of the product
PDF
ENG
02/2023
Böllhoff bulletin: Changeover to Cr6+-free protective zinc layers for fasteners
PDF
ENG
1622/15.02
Fastening and assembly technology: Products and services
PDF
ENG
1180/21-V1-EN (WBH)
RIPP LOCK® screw lock: Efficient and secure
PDF
ENG
8210/21-V1-EN (WBH)
The Manual of fastening Technology: 8th edition
PDF
ENG
8100/23-V1-EN (WBH)