Technical Section
Polyamide Patch (blue for standard spring load, green for high spring load)
Thread Locking with Jamming Action for GN 615 and GN 615.3 Ball Plungers

l1~ 2 to 3 x Thread lead
l2 ~ 1.5 x d (Thread diameter)

W1: Coating core zone
W2: Coating including edge zone

l1 l2 Min
M3 1 to 1.5 4.5 0.43 0.1
M4 1.5 to 2 6 0.9 0.15
M5 1.5 to 2.5 7.5 1 0.2
M6 2 to 3 9 2 0.6
M8 2.5 to 3 12 4 1
M10 3 to 4.5 15 5 1.5
M12 3.5 to 5 18 7 2.3
M16 4 to 8 24 10 4
The torque values are based on a test of a thread without preload, with a nut thread of 6H at room temperature.


The polyamide patch coating (DIN 267/28) is a process whereby an elastic plastic material (Polyamide) is applied to part of a thread which creates a jamming action during the tightening of a nut. The play between the bolt and nut is taken up by the Polyamide thus ensuring maximum surface contact between the uncoated thread areas. This process counteracts the loosening and unscrewing of the parts.

There is no setting time required. The thread contact is instantaneous. The feather edge of the Polyamide deposit prevents breakage.

Threads with polyamide patching have unlimited stock life.


High thread locking action

Excellent for adjusting bolts

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

Multi use is possible whereby the jamming effect after the fifth removal is still around 50% of its original strength.

Temperature range from -50 to +90C (short duration 120C)

High chemical stability

Call our sales staff for ordering assistance.

To Tolerances Used for Standard Metric and Inch Size Bores