Square 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

Square lock nuts are a type of locking nut designed to resist loosening under vibration and torque. They are commonly used in industrial and mechanical applications where secure fastening is critical. Here’s a detailed description:

Features of Square Lock Nuts:

1. Shape – As the name suggests, these nuts have a square profile instead of the typical hexagonal shape, providing a larger surface area for gripping with wrenches or other tools.

2. Locking Mechanism – They often incorporate a locking feature such as:

   • Nylon Insert (PAL Nut) – A nylon ring inside the nut creates friction against the bolt threads to prevent loosening.

3. Material – Typically made from steel (plain, zinc-plated, or stainless steel), brass, or nylon for corrosion resistance and durability.

Advantages:

• High Torque Resistance – The square shape allows for better grip and higher torque application.

• Vibration Resistance – The locking mechanism prevents loosening in high-vibration environments (e.g., machinery, automotive, and aerospace applications).

• No Need for Additional Lock Washers – The built-in locking feature eliminates the need for separate lock washers in many cases.

Installation Notes:

• Should be tightened to the recommended torque specifications.

• Nylon-insert types may lose effectiveness after repeated use due to wear.

• Serrated base types require a clean, flat surface for optimal grip.