TR Self-Clinch Broaching Nut Installation





Self Clinch Broaching Nut Installation Step 1 Self Clinch Broaching Nut Installation Step 2 Self Clinch Broaching Nut Installation Step 3 Self Clinch Broaching Installation Step 4
Select the appropriate hole size from the table below for the nut size required. Punch the hole diameter into the sheet material. Place the Nuts spigot end into the hole on the side opposite the mating face. So that nut rests on the serrations.  Ensure both plate and nut are aligned along the same axis.  If the nut is not seated ‘square’ in the hole, the joint will be imperfect and mating threads will mis-align. Using a profiled punch, apply only sufficient pressure to ‘squeeze’ the nut serrations into the parent sheet metal.  The serrations if properly installed will provide torsional (rotational) resistance. After installation the spigot joint should be flush with the sheet metal.
Click on the play button to watch the installation animation.

Using the table below with reference to the specific size of the Hexagon flush nut, select the correct Hole size for the installation of the fastener.  

For the best dimensional accuracy and therefore performance, TR Fastenings recommends that all holes in the sheet metal application be punched.   

Note it is essential that the recommended Hole tolerances be observed.

Hole Sizes - Metric (mm)

Thread and Pitch M2.5 0.45 M3 0.5 M4 0.7 M5 0.8
Minimum rec sheet thickness 1.53 1.53 1.53 1.53
Hole size +0.08 -0.00 4.22 4.22 6.40 6.90
Minimum distance to edge of sheet 4.4 4.4 6.4 7.1


Note: Due to the fact that fastening applications differ greatly, the above information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.