TR Self-Clinch Nut Installation

The TR Self-Clinch nut can be installed into a pre-punched or pre-drilled hole using a press capable of a squeezing action, causing the parent material to flow into the specially designed under head configuration offering a load bearing and torque resistant joint. 

 

STEP 1

STEP 2

STEP 3

STEP 4

Self Clinch Nut Installation Step 1 Self Clinch Nut Installation Step 2 Self Clinch Nut Installation Step 3 Self Clinch Nut Installation Step 4
Ensure the correct spigot length has been selected for sheet thickness being used.  Select the appropriate hole size from the table below for the bush 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 clinch 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.  

To install the fastener into the punched Hole a profiled punch is required.  Note it is essential that the recommended Hole tolerances be observed.

Hole Sizes - Metric (mm)

 
Thread and pitch M2 M2.5 M3 M3alt M3.5
Code 0 -1 -2 0 -1 -2 0 -1 -2 0 -1 -2 0 -1 -2
Minimum rec sheet thickness 0.8 1 1.4 0.8 1 1.4 0.8 1 1.4 0.8 1 1.4 0.8 1 1.4
Hole size ±0.08 -0.00 4.25 4.25 4.25 4.75 4.75
Minimum distance to edge of sheet 4.8 4.8 4.8 5.6 5.6

 

Thread and pitch M4 M5 M6 M8 M10
Code 0 -1 -2 0 -1 -2 -1 -2 -1 -2 -1 -2
Minimum rec sheet thickness 0.8 1 1.4 0.8 1 1.4 1.4 2.3 1.4 2.3 2.3 3.1
Hole size ±0.08 -0.00 5.4 6.4 8.75 10.5 14
Minimum distance to edge of sheet 6.9 7.1 8.6 9.7 13.55
 

Hole Sizes - Inch (inches)

 
Thread and pitch #2-56 #4-40 #6-32
Code 0 -1 -2 0 -1 -2 -3 0 -1 -2 -3
Minimum rec sheet thickness .032" .040" .056" .032" .040" .056" .091" .032" .040" .056" .091"
Hole size ±0.08 -0.00 .166" .166" .188"
Minimum distance to edge of sheet .19" .19" .22"

 

Thread and pitch #8-32 #10-24 & 10-32 #12-24
Code 0 -1 -2 -3 0 -1 -2 -3 -1 -2 -3
Minimum rec sheet thickness .032" .040" .056" .091" .032" .040" .056" .091" .040" .056" .091"
Hole size ±0.08 -0.00 .213" .250" .277"
Minimum distance to edge of sheet .27" .28" .31"
 
Thread and pitch #1/4-20 #5/16-18 #3/8-16
Code -1 -2 -3 -1 -2 -3 -1 -2 -3
Minimum rec sheet thickness .056" .091" .125" .056" .091" .125" .091" .125" .250"
Hole size ±0.08 -0.00 .344" .413" .500"
Minimum distance to edge of sheet .34" .38" .44"
 

Tooling - Standard

 

Self Clinch Nut Punch Anvil Standard 1 Self Clinch Nut Punch Anvil Standard 2

Tooling - Hard Stainless

 

Self-Clinch Nut Punch And Anvil Digram Hard Stainless

Punch Dimensions 
Self-Clinch Nut Punch Digram Hard Stainless Thread Size A mm +/- 0.05 P mm +/- 0.03 R mm Max. R1 mm + 0.13
M3 6.48 1.42 0.25 0.13
M4 8.05 1.93 0.25 0.13
M5 8.84 1.93 0.25 0.13
Anvil Dimensions
Self-Clinch Nut Anvil Diagram Stainless Thread Size A1 mm +/- 0.05 B mm Nominal P1 mm + 0.03 R2 mm Max.
M3 5.05 6.63 0.23 0.08
M4 6.17 7.75 0.23 0.08
M5 7.34 8.89 0.23 0.08


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.