Fasteners with locking coating
Non-reactive systems (locking systems)
- DIN 267, part 28
- Complete, plastic spot or thread coating, which causes a locking effect when screwed in, and does not stop the connection from unscrewing but prevents complete loosening.
- With threads of: nylon, aramide, metal (Cu, Al)
DIN 267, part 28 screws with locking coating
Tuflok, Clemm-Loc, polyamide spot coatings and complete polyamide coatings
The locking coating is not a lock to prevent unscrewing (like an adhesive coating), rather a retainer.
The locking torque is not capable of preventing self-unscrewing in the event of a high pretensioning force. A balance is only achieved between the locking torque and the unscrewing torque with a low residual pretensioning forc
The "blue spot" is also suitable where other systems fail technically or economically:
- For very small screws - from M 0.8
- For screws made of a hard material
- For screws that must not be weakened in the cross-section
- For threaded pins
Fastener with locking coating
- Standard coating
- Unless otherwise agreed, the coating length is 1.5 x d ±2P, measured from the end of the screw.
- The first 2-3 threads remain free in order to be screwed in better
.
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