Hexagon Projection Weld Nuts

The core advantage of Hexagon Projection Weld Nuts is that they are permanently fixed to the metal sheet through the resistance spot welding process, providing a reliable internal thread connection point.

（1）Provide permanent internal threads

After welding, the nut and the workpiece are fused together, forming an inseparable threaded hole for subsequent bolt connections. Unlike ordinary nuts, it will not loosen due to vibration or long-term use.

（2）Achieve one-sided assembly

Since the nut has been welded onto the workpiece, during assembly, only the bolt needs to be inserted from one side, and there is no need to fix the nut on the back of the workpiece using a wrench. This is particularly suitable for closed structures, boxes, or situations with limited space.

（3）Anti-loosening and vibration resistance

The welding connection is permanent, and the Hexagon Projection Weld Nuts will not rotate or come off. Even in a highly vibrating environment, it can maintain a reliable connection without the need for additional spring washers for fixation.

（4）Improve assembly efficiency

Welding nuts can be pre-installed on the workpiece. In the subsequent assembly line, bolts only need to be quickly screwed in, eliminating the need for manual handling of the nuts, aligning the holes, and adding washers, significantly enhancing production efficiency.

（5）suitable for thin plate connections

On thin sheet metal (0.8 - 3.0mm), direct tapping is insufficient in terms of strength. Ordinary nuts and bolts require bilateral operation. The welded nuts are firmly attached through protruding welding, providing a high-strength threaded connection point for the thin plate, and will not crush the sheet.

Anti-rust maintenance

The rust resistance of Hexagon Projection Weld Nuts depends on their material and surface treatment.

（1）Electro-galvanizing

After cleaning the surface, apply cold galvanizing spray or apply anti-rust oil

Performed once a year or when rust spots are found

（2）Hot-dip galvanizing

The coating is thicker and generally does not require maintenance; if scratched, a zinc-rich primer can be reapplied

Check annually and repair as needed

（3）Dacromet/Zinc-Aluminum Coating

The coating has good durability; minor scratches can be repaired with Dacromet repair liquid

Check every 2 years

（4）Developed black color

The rust prevention ability is relatively poor. It is necessary to regularly apply rust preventive oil (such as WD-40) on the surface of the Hexagon Projection Weld Nuts to maintain a good rust prevention effect.

Frequency: monthly or after each touch

（5）Stainless steel in its natural color

It requires minimal maintenance. Just clean the surface salt deposits regularly (by rinsing with fresh water).

The cycle is every 6 months (for coastal environments).