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There are different systems available for locking screw joints. Adhesive, clamping or mechanical locking systems or a combination of them are used according to the requirements.
adhesive (chemically reactive)
| spedcaps® |  |
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- high loosening resistance
- micro-encapsulated, 2-component liquid adhesive
- applied ready for insertion
- good seal up to 400 bar
- high temperature resistance
- complies with DIN 267, Part 27
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clamping (chemically non-reactive)
| spedlack® | spedstop® / TUF-LOK® |
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- as adjusting screw
- loss-proof pre-assembly
- for multiple re-use
- applied ready for insertion
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- spot or all-round coating
- high loosening values
- for multiple re-use
- complies with DIN 267, Part 28
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mechanical
| POWERLOK® | TAPTITE 2000® |
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- attached 30° point
- used in tapped threads
- functions irrespective of temperature
- trilobular thread cross section
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- fits free of play in female thread
- trilobular thread cross section creates easy positive lock
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mechanical and chemically reactive
TAPTITE 2000® with spedcaps®
- combines the advantages of thread rolling and high loosening resistance
- European Patent No. 0483318
Comparative loosening resistance
Tested on the SFS intec electronic fastener test bed (test with M5 screw size)
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