TR Self Clinch Flush Nut installation

 
1 Step 1

Ensure the correct spigot length has been selected for sheet thickness being used. Select the appropriate hole size from the table below for the nut size required. Punch the hole diameter into the sheet material.

2 Step 2

Place the nuts spigot end into the hole on the side opposite the mating face. So that nut rests on the hexagon. 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 misalign.

3 Step 3

Using a profiled punch, apply only sufficient pressure to ‘squeeze’ the nut into the parent sheet metal. 

4 Step 4

The hexagonal head if properly installed will provide torsional (rotational) resistance. After installation the hexagon head should be flush with the sheet metal and the spigot should not protrude through the opposite side.

 

 

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 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 M3alt 0.5 M3.5 0.6 M4 0.7 M5 0.8 M6 1.0
Code -1 -2 -1 -2 -1 -2 -1 -2 -1 -2 -1 -2 -3 -4 -4
Minimum rec sheet thickness 1.5 2.4 1.5 2.4 1.5 2.4 1.5 2.4 1.5 2.4 1.5 2.4 3.2 4.0 4.8
Hole size +0.08 -0.00 4.4 4.4 5.4 5.4 7.4 7.9 8.75
Minimum distance to edge of sheet 6.0 6.0 6.5 6.5 7.2 8.8 8.8
 

 

Hole sizes - inches


Imperial dimensions
Thread and pitch No.4 No.6 No.8 No.10 1/4"
Code -1 -2 -1 -2 -1 -2 -1 -2 -3 -4 -5
Minimum rec sheet thickness .061 .091 .061 .091 .061 .091 .061 .091 .125 .156 187
Hole size +0.08 -0.00 .172 .213 .290 .312 .344
Minimum distance to edge of sheet .23 .27 .28 .31 .34
 

 

Tooling


Flush Nut Tooling