external tooth lockwasher

[ɪkˈstɜːrnəl tuːθ ˈlɒkwɒʃər]
nounpl: external tooth lockwashers
arruela de trava com dentes externos
1. A type of fastener washer featuring teeth on the outer diameter that dig into the surface of a bolt head or nut to prevent loosening due to vibration or rotation
The mechanic installed an external tooth lockwasher under the bolt to ensure it wouldn't vibrate loose during operation.
O mecânico instalou uma arruela de trava com dentes externos sob o parafuso para garantir que não se soltasse durante a operação.
2. A hardware component designed to provide mechanical locking action and increased friction between fastener and substrate
External tooth lockwashers are commonly used in automotive and machinery applications.
As arruelas de trava com dentes externos são comumente usadas em aplicações automotivas e de maquinário.
External tooth lockwashers are standard hardware components in both American and Brazilian industrial, automotive, and mechanical engineering contexts. They are typically specified in technical documentation and engineering drawings by their standardized names. In Brazil, they are widely available through industrial suppliers and are essential in manufacturing and maintenance operations.
Synonyms / Sinônimos
external tooth washerstar lock washerexternal star washertooth lockwasher
Antonyms / Antônimos
internal tooth lockwashersplit lock washerplain washer

Regional Variations

General Brazilian
arruela de trava com dentes externos
Most common usage in Brazilian Portuguese technical documentation
São Paulo
arruela de segurança com dentes externos
Alternative term sometimes used in industrial contexts
Portugal
anilha de travamento com dentes externos
European Portuguese variant using 'anilha' instead of 'arruela'

Related Words

lockwashersplit lock washerinternal tooth lockwasherfastenerboltnutwashervibration resistance
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