TR Self-Clinch Floating Fastener Installation

The TR Self-Clinch Floating Fastener 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 in to the specially designed under head configuration offering a load bearing and torque resistant joint. 





Self Clinch Floating Fastener Step 1 Self Clinch Floating Fastener Step 2 Self Clinch Floating Fastener Step 3 Self Clinch Floating Fastener 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.  Using a profiled punch with an appropriate collar, 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.

Using the table below with reference to the specific size of the fastener, 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 size and pitch M3 0.5 M4 0.7 M5 0.8 M6 1.0
Min sheet thickness 1 1.4 1 1.4 1 1.4 1.4
Hole size ±0.08 7.4 9.4 10.31 13.1
min distance to hole c/l to edge 7.62 8.64 9.14 11.0


tool scff1 update 2               Thread                 
A mm
+/- 0.03
B mm
+/- 0.13
D mm
M3 1.37 6.55 7.37
M4 1.37 6.55 9.28
M5 1.8 6.12 10.29
M6 2.34 5.59 12.96


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.