Round Serrated Face Mini Rivet Bush Stand-off Installation

The mini rivet bush standoff features a high torque resisting riveting pillar. and has the same design characteristics as the Standoff & Hank Sert Rivet Bushes with additional advantage of being of being small enough to work in restricted spaces.




Mini Standoff Installation Step 1 Mini Standoff Installation Step 2 Mini Standoff Installation Step 3
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. Place the sheet metal on the busg 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 mis-align. 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. After installation the spigot is to be flush. 


Mini Standoff Installation Step 5 Mini Standoff Installation Step 6 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 hank sert mini rivet bush standoff, 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)

Thread form M2 M2.5 M3 M3.5 M4 M5 M6 M8 M10 M12
Recommended hole size +0.05 -0.00mm 3.50 4.19 4.19 5.41 5.41 6.40 7.70 9.70 12.70 15.87

Hole Sizes - Inch (inches)

Thread form BSW/F - - 1/8" - 5/32" 3/16" 1/4" 5/16" 3/8" 1/2"
BA 8 - 6.5 4 3 2 0 - - -
UNC 2 - 4 6 8 10 1/4" 5/16" 3/8" 1/2"
UNF 2 - 4 6 8 10 1/4" 5/16" 3/8" 1/2"
Recommended hole size +0.002 -0.000™ .138 .165 .165 .213 .213 .252 .303 .382 .500 .625



Mini Rivet Bush Punch

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
M2 5.00 3.05
M2.5/M3 9.05 3.68
M3.5/M4 10.50 4.90
M5 12.00 5.87
M6 14.00 7.09
M8 16.30 8.89
M10 21.90 11.89
M12 25.40 15.04

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.