12-point metal lock nut

The fastening and opening of bolts and nuts adopts non-standard design, and the matching
non-standard tools are used to solve the opening and fastening problems. In general, other
wrenches cannot be inserted. In the appearance design of nuts and bolts, non-standard slotting,
opening or pentagonal, heptagonal, nine-corner or custom-made corresponding groove tools
have played a very good anti-theft effect

Cold heading process is one of the new processes for pressure machining of less or no cutting
metal. It is a processing method that utilizes the plastic deformation of metal under the action of
external forces, and with the aid of molds, redistributes and transfers the volume of metal to form
the required parts or blanks. The cold heading process is most suitable for producing standard
fasteners such as bolts, screws, nuts, rivets, and pins.etc

A 12-point metal lock nut 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.