thread locker

[/θrɛd ˈlɑkər/]
nounpl: thread lockers
trava-rosca
1. A liquid adhesive compound applied to threaded fasteners (bolts, screws, nuts) to prevent them from loosening due to vibration or thermal cycling
The mechanic applied thread locker to the engine bolts to ensure they wouldn't vibrate loose.
O mecânico aplicou trava-rosca nos parafusos do motor para garantir que não se afrouxassem com a vibração.
2. A chemical product used in mechanical assembly and maintenance to secure threaded connections
High-strength thread locker is required for critical structural connections.
Uma trava-rosca de alta resistência é necessária para conexões estruturais críticas.
Thread locker is essential terminology in Brazilian automotive, aerospace, and manufacturing industries. The product is widely known as 'Loctite' (brand name) in colloquial usage, especially in workshops and among mechanics. In the USA, it's a standard industrial product, while in Brazil it's increasingly used in mechanical maintenance and assembly operations as quality control standards rise.
Synonyms / Sinônimos
thread-locking compoundthreadlockeranaerobic adhesivescrew lockerbolt locker
Antonyms / Antônimos
thread releaserpenetrating oil

Regional Variations

General Brazilian
trava-rosca
Standard term used across Brazil in mechanical and industrial contexts
São Paulo
trava-rosca / selador de rosca
Both terms commonly used in industrial manufacturing hubs
Portugal
adesivo de rosca / travante de rosca
Portuguese European variant; less commonly used than Brazilian term

Related Words

fasteneradhesivevibrationboltscrewnutmechanical assemblyanaerobic

Related Idioms & Phrases

lock down the threads
prevent bolt creep
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