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Locking by bonding function

To secure a screw assembly, it is not enough to screw on the screw or bolt and then tighten it to the recommended tension. It is also necessary to use a threading locking mechanism to prevent undesired loosening due to vibrations, impact or thermal expansion.

There are many different techniques, but the most common involves placing a drop of thread lock (anaerobic adhesive) on the threading of the threaded mounting hardware: screws, nuts, dowels, threaded stems, stoppers…

This is an efficient thread lock solution as it can be used to glue both parts of the assembly, but it is costly to implement and results may vary.

Liquid thread lock has therefore been replaced, for many applications, by threading pre-coated with adhesive.

This technique involves pre-coating the threaded hardware with a microencapsulated adhesive that only activates during assembly. When the screw or bolt is tightened, the adhesive released by the bursting of the microcapsules mixes with the hardening agent and glues the threaded parts together like a traditional thread lock.

Light thread lock (equivalent to blue thread lock) that can be repositioned several times can also be obtained by depositing a polyamide on the threads of the threaded hardware: More information on the reusable locking function 

Download the technical data sheet

Locking by bonding function

The assemblies unscrew because of the vibrations, shocks and thermic dilatations. Numerous technologies have been developed in order to secure the screwed assemblies to avoid untimely unscrewing.
The most efficient solution against unscrewing is to bond the threads by the pre-coat technology.
The technique consists in pre-coating the threads with a microencapsulated adhesive which is activated only while screwing. Upon assembly, the adhesive components are released and creates a bond between the male and female threads. It is the most effective anti-unscrewing solution.

Advantages

The pre-coated fasteners replace the common thread locking solutions thanks to utmost technical performances and economical advantages:

Excellent performances: excellent resistance against vibrations
Easy conception: replaces standard screws without a re-conception of the assembly
Rapid assembly: no need of a washer nor adhesive
Technical control: the deposed volume of the pre-coating product on the assembly is always the same
Excellent quality: no omission possible of the coating process
Important reduction of the assembly costs: high productivity in workshop and on construction site
Suppression of the hygienic and security problems due to the fluid adhesives

CHARACTERISTICS AND PRODUCTS

The pre-coating products that we apply come from long partnerships with many manufacturers.

SuppliersProductColorFunctions
3m3M 2353Dark blueHigh strength
3m3M 2510OrangeHigh strength
precotePrecote 30YellowLow strength and sealing
precotePrecote 80Green or PinkHigh strength
precotePrecote 85TurquoiseLow strength with controlled torque

Quality

Our processes are ISO 9001 certified and fulfill specific requirements in the automotive industry.
QAS 9001 Logo

Approvals

Our products are approved to many standards:
Renault CDC 39.02.010
PSA B14.12.35
DIN 267-27
IFI 25/525
BS 7795
GM 6175
FORD WX200 & 201

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