Pentagonal barrel nut

O processo de encabeçamento a frio é um dos novos processos para a maquinagem sob pressão com menos ou nenhum corte
metal. É um método de processamento que utiliza a deformação plástica do metal sob a ação de
forças externas e, com a ajuda de moldes, redistribui e transfere o volume de metal para formar
as peças ou os espaços em branco necessários. O processo de encabeçamento a frio é o mais adequado para a produção de
elementos de fixação, tais como cavilhas, parafusos, porcas, rebites, cavilhas, etc.

A pentagonal barrel nut is a specialized type of fastener designed for security and tamper resistance. Here’s a detailed description:

Caraterísticas principais:

1. Shape:

   • Externally Pentagonal (5-sided): Unlike standard hexagonal nuts, it has five flat sides, requiring a matching pentagonal socket for installation/removal.

   • Barrel (Cylindrical) Design: The nut has a rounded, barrel-like body, making it harder to grip with conventional tools.

   • Pentagonal barrel nut

2. Tamper-Resistant Design:

   • The uncommon pentagonal shape prevents easy removal with standard hexagonal wrenches or pliers.

   • Often used in high-security or public installations where vandalism/theft is a concern.

3. Materiais:

   • Typically made from hardened steel, stainless steel, or brass for durability and corrosion resistance.

4. Tipo de rosca:

   • Available in various thread sizes (metric or imperial) to fit corresponding bolts.

5. Aplicações:

   • Used in public fixtures (e.g., benches, signage), electronics, automotive, and machinery where tamper-proofing is needed.

   • Common in industries requiring controlled access (e.g., transportation, utilities).

Vantagens:

• Security: Deters casual tampering due to the lack of standard tools.

• Durabilidade: Resists wear and corrosion.

• Aesthetics: Smooth barrel shape provides a clean look.

• Pentagonal barrel nut

Disadvantages:

• Requires a special pentagonal socket/key for installation/removal.

• Limited availability compared to standard nuts.