ABNT NBR 10097 – Anéis de retenção para furos – Seção retangular – Especificação
ABNT NBR 15933 – Anéis-trava — Arame de seção circular para pinos de pistões
ABNT NBR 16100 – Anéis de retenção para furos — Seção retangular — Especificação
Portaria Inmetro Nº 301 de 21 de Julho de 2011– anexo IV
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