五角バレルナット

冷間圧造加工は、切削の少ない、あるいは切削を必要としない新しい圧造加工のひとつである。
金属。の作用による金属の塑性変形を利用した加工法である。
外力を受け、金型の助けを借りて、金属の体積を再分配し、移動させる。
必要な部品やブランクを製造します。冷間圧造工程は、標準的な
ボルト、ネジ、ナット、リベット、ピンなどの留め具。

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

主な特徴

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.

   • 五角バレルナット

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. 材料:

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

4. スレッドタイプ:

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

5. アプリケーション:

   • 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).

利点がある：

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

• 耐久性: Resists wear and corrosion.

• Aesthetics: Smooth barrel shape provides a clean look.

• 五角バレルナット

Disadvantages:

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

• Limited availability compared to standard nuts.