TR Self Clinch Through Standoff installation


The TR Self Clinch Through Standoff is manufactured in stainless and mild steel to ensure a high performance in a broad variety of applications, particularly thouse demanding durable performance in the electronic industry. Installation parameters such as flush to sheet, positional/assembly accuracy and ease are simply and efficiently achieved.

1 Step 1 Through Standoff Step 1

Select the appropriate hole size from the table below for the standoff size required. Punch the hole diameter into the sheet.

2 Step 2 Through Standoff Step 2

Place the standoff 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 misalign.

3 Step 3 Through Standoff Step 3

Using a punch, apply only sufficient pressure to ‘squeeze’ the hexagon head into the parent sheet.

4 Step 4 Through Standoff Step 4

The hexagon head if properly installed will provide torsional (rotational) resistance. After installation the head should be flush with the sheet. 



Installation animation


Using the table below with reference to the specific size of the Through Standoff, select the correct hole size for the installation of the fastener.

For the best dimensional accuracy and therefore performance, TR 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 and pitch M2.5   M3 M3alt M4 M5
Min rec sheet thickness 1 1 1.3 1.3
Hole size +0.08 -0.00 4.2 5.4 7.14 7.14
Min distance to edge of sheet 6 6.8 8 8


Hole sizes - inches

Thread and pitch 4-40 64-40 6-32 86-32 8-32 10-32
Min rec sheet thickness 0.04 0.04 0.04 0.05 0.05 0.05
Hole size +0.003" -0.0" 0.166 0.213 0.213 0.281 0.281 0.281
Min distance to edge of sheet 0.23 0.27 0.27 0.31 0.31 0.31



Self Clinch Through Stand off Punch Anvil Diagram Thread size D  mm
M3 4.18
M3 alt 5.39
M4 7.10
M5 7.10
‘L’ = length of standoff