12-point metal lock nut

螺栓與螺帽的鎖緊與開口採用非標準設計，搭配
使用非標準工具來解決打開和緊固問題。一般而言，其他
wrenches cannot be inserted. In the appearance design of nuts and bolts, non-standard slotting,
開口或五角、七角、九角或客製化對應槽工具
起到了很好的防盜效果

冷镦加工是一种少切削或无切削的压力加工新工艺
金屬。它是一種利用金屬在下列因素作用下產生塑性變形的加工方法
外力作用下，在模具的幫助下，重新分配和轉移金屬的體積，以形成
所需的零件或坯料。冷镦工艺最适合生产标准的
螺栓、螺絲、螺帽、鉚釘和銷等緊固件

A 12-point metal lock 螺帽 is a high-strength, vibration-resistant fastener featuring a dodecagonal (12-sided) head and an all-metal locking mechanism. Designed for critical applications where reliability is paramount, this nut provides secure fastening without nylon inserts, making it suitable for extreme temperatures, heavy loads, and harsh environments.

Key Features & Benefits

1. 12-Point Head Design

• 30° tool engagement (vs. 60° for hex nuts) for easier access in tight spaces.

• Compatible with standard 12-point sockets (common in aerospace, automotive, and industrial applications).

2. All-Metal Locking Mechanism

• Prevailing torque design (deformed threads, elliptical tops, or serrated bases) prevents loosening under vibration.

• No nylon insert – Suitable for high-temperature applications (>250°F/121°C).

• Reusable – Maintains locking performance after multiple installations.

5. Standards & Compliance

• ISO 4161 (12-point thin nuts)

• DIN 938/939 (Metric 12-point lock nuts)

• MIL-N-25027 (Military/aerospace specifications)

• NASM 25027 (National Aerospace Standards)

Customization Options

• Thread size/pitch (Metric, UNC, UNF, or custom).

• Locking style (Top-curl, elliptical, or serrated flange).

• Head thickness (Standard, thin, or jam nut variants).

• Special coatings (Xylan®, Geomet®, or nickel plating).

Summary

The 12-point metal lock nut is a heavy-duty, reusable fastener combining the tool accessibility of a 12-point head with all-metal vibration resistance. Ideal for high-stress, high-temperature, or corrosive environments where nylon inserts would fail.