self-locking nut

[/self ˈlɒkɪŋ nʌt/]
nounpl: self-locking nuts
porca autotravante
1. A type of fastening nut that prevents itself from loosening due to vibration or rotation, typically through an internal mechanism such as a nylon insert, deformed thread, or interference fit
The engineer specified self-locking nuts for the aircraft assembly to ensure the fasteners would not vibrate loose during flight.
O engenheiro especificou porcas autotravantes para a montagem da aeronave para garantir que os elementos de fixação não se afrouxassem durante o voo.
2. A nut designed to maintain its tightness without requiring a lockwasher or additional locking device
Self-locking nuts are preferred in machinery subjected to constant vibration.
Porcas autotravantes são preferidas em máquinas submetidas a vibração constante.
Self-locking nuts are widely used in Brazilian and American industrial, automotive, and aerospace sectors due to strict safety regulations. They are considered essential components in critical applications where equipment reliability is paramount. The term is well-established in technical documentation and manufacturing specifications across both countries.
Synonyms / Sinônimos
lock nutprevailing torque nutall-metal lock nutnylon insert nut
Antonyms / Antônimos
regular nutstandard nuthex nut

Regional Variations

General Brazilian
porca autotravante
Standard term used in engineering and construction contexts
São Paulo
porca autotravante ou porca de segurança
Both terms are commonly used in industrial settings
Portugal
porca autobloqueante
Preferred term in Portuguese European technical standards
General Brazilian (Technical)
porca de segurança
Alternative term emphasizing the safety aspect

Related Words

boltfastenerlockwasherthread lockervibration resistancemechanical fastening

Related Idioms & Phrases

vibration-proof fastening
secured without additional hardware
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