TR Self-Clinch Blind Stand-off Installation





Self Clinch Blind Stand off Installation Step 1 Self Clinch Blind Stand off Installation Step 2 Self Clinch Blind Stand off Installation Step 3 Self Clinch Blind Stand off Installation Step 4
Select the appropriate hole size from the table below for the stand-off size required. Punch the hole diameter into the sheet material. Place the stand-off spigot end into the hole on the side opposite the mating face. So that stand-off rests on the hexagon head.  Ensure both plate and stand-off are aligned along the same axis.  If the stand-off 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 hexagon head into the parent sheet metal.  The hexagon head if properly installed will provide torsional (rotational) resistance. After installation the head  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 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 of a suitable size is required.  

Note it is essential that the recommended Hole tolerances be observed.

Hole Sizes - Metric (mm)

Thread and pitch M3 0.5 M3alt 0.5 M4 0.7 M5 0.8
Min rec sheet thickness 1.0 1.0 1.3 1.3
Hole size +0.08 -0.00 4.2 5.4 7.2 7.2
Min distance to edge of sheet 6 6.8 8 8

Hole Sizes - Inch (inches)

Thread and pitch No.4 No.6 No.8 No.10
Min rec sheet thickness .040 .040 .050 .050
Hole size +0.08 -0.00 .166 .213 .281 .281
Min distance to edge of sheet .23 .27 .31 .31


Self Clinch Blind Stand off Punch Anvil Diagram                       Thread Size                                  D  mm             
M3 4.18
M3alt 5.39
M4 7.10
M5 7.10
‘L’ = length of standoff

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.