homepageproduct overview thread lock with jamming action, polyamide patch (blue) pfbgewindeenden din 78

Thread locking (gluing)
Micro encapsulation precote (red)


l1 ~ 2 to 3 x Thread lead
l2 ~ 1,5 x d

d l1 l2» MIN [Nm] MLO [Nm] MOUT [Nm]
      max. torque min. cracking torque max. loosening torque
M 5 1,5 to 2,5 7,5 1 1 6,5
M 6 2 to 3 9 1,5 1,8 10
M 8 2,5 to 4 12 3 4 26
M 10 3 to 4,5 15 5,5 10 55
M 12 3,5 to 5 18 7,5 16 95
M 16 4 to 6 24 14 35 250
M 20 5 to 7,5 30 22 45 500

The torque value comply with DIN 267 Part 27. They are based on a test of a thread without preload with a nut thread of 6H at room temperature. For thread lengths l0 < l2, l2 is reduced in such a way that one to two thread turns are not coated at the end of the thread.


The principle of micro encapsulation consists of a liquid plastic material and hardener encapsulated in a thin polymer film which is embedded in a lacquer like carrier deposited in patch form an a thread. This patch dries and the component can be stored and handled in a normal manner.

When fitting a bolt with this patch the two capsules will burst under the pressure and friction between the two threads. The liquid plastic material and hardener will mix leading to a chemical reaction which will harden the glue, thus giving the required thread locking.

The setting of the mixture will start after 10-15 minutes. Sufficient hardness is achieved after about 30 minutes but complete setting is reached after 24 hours.

Adjustment and setting process must be completed within about 5 minutes.

The thread locking can be cracked by applying the MOUT torque on the thread or alternatively by heating the component over +180 °C. It is not recommended to re-use the thread.

Threads, free from oil and grease give increased strength of locking action.

Components treated with this process can be stored for up to four years.


Thread locking to the highest order to prevent the self loosening and component loss even under vibration.
Not suitable for adjusting bolts or screws.

This security aspect may be essential for certain applications of standard parts.
Stockholding of liquid glue is eliminated.

Low torque

Temperature range: -40 °C to +170 °C.

Excellent chemical stability.

How to order:

When ordering, the code MVK has to follow the part number, i.e.

Spring loaded plunger

GN 615-M8-K-MVK

thread lock with jamming action, polyamide patch (blue) pfbgewindeenden din 78