Swage Nut Rivet Bush installation


The Swage Nut Rivet Bush features a high torque resisting joint and has been introduced into the Rivet Bush range as an alternative size option to the Hanksert®.

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 bush required. Punch the hole diameter into the sheet material.

2 Step 2

Place the sheet metal on the bush so the spigot protrudes through the hole. If the bush is not seated ‘square’ in the hole, the joint will be imperfect and mating threads will misalign.

3 Step 3 - Automated

Using a profiled punch, apply only sufficient pressure to ‘peen’ the spigot over into the sheet metal and allow the serrations on the face to embed in the face of the sheet, providing torsional resistance.



Installation animation

Swage Nut Installation Step 5 Rivet Bush in Sheet metal For best torsional and pull-out resistance, the serrated face should be fully embedded in the face of the sheet material and the spigot should be flush with the underside of the sheet after installation.

Using the table below with reference to the specific size of the Swage Nut Rivet Bush, 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 or a ball bearing of a suitable size is required. The profiled punch can be sourced from the TR Fastenings sales team



Hole sizes - metric (mm)

Dimensions in mm M3 M4 M5 M6
Recommended hole size +0.05 -0.00mm 4.25 5.40 6.40 8.75


Hole sizes - inches

Dimensions in inches No.4 No.6 No.8 No.10 1/4"
Recommended hole size +0.002" -0.000" 0.166 0.188 0.213 0.251 0.344



Swage nut rivet bush tooling

Detail 1 - Oil hardening steel 665 M17 (EN34) 

Note: 760°C - 780°C oil quench temper 150°C - 200°C

Punch dimensions 
Thread size A B
M3 9.05 3.80
M3.5 10.50 4.30
M4 10.50 4.95
M5 12.00 5.95
M6 14.00 8.25
M8 16.30 10.00