STN self-piercing clinch nut
for automated feeding and processing
STN self-piercing clinch nut for increased torque and push out forces, as well as high pull through forces. Suitable for thin metal sheets. In use at car manufacturer OEMs in Germany.
Sheet thickness - Insertion in metal sheets with thicknesses from 0.7mm to 2.5mm
Thread size - M5, M6, M8, M10, M12
Workpiece material - Steel, aluminum, copper
Outer diameter - Medium
Pull-through force - High
Torque - Very high
Push-out force - Very high
| Product | Thread (d3) | Outer diameter in mm (d1) | Collar diameter in mm (d2) | Height in mm (l1) | Max. collar height in mm (l2) | Polot hole diameter in mm (Ø -0,1) | Sheet thickness in mm (s) |
|---|---|---|---|---|---|---|---|
| STN self-piercing nut | M5 | 14.00 | 8.45 | 5.00 | 0.80 | 8.60 | 0.70 - 2.50 |
| STN self-piercing nut | M6 | 14.00 | 8.45 | 5.00 | 0.80 | 8.60 | 0.70 - 2.50 |
| STN self-piercing nut | M8 | 16.00 | 10.45 | 5.90 | 0.80 | 10.60 | 0.70 - 2.50 |
| STN self-piercing nut | M10 | 18.50 | 12.45 | 7.20 | 0.80 | 12.60 | 0.70 - 2.50 |
| Thread | Material | Sheet thickness (mm) | Push out force (kN) | Torsional strength (Nm) |
|---|---|---|---|---|
| M6 | Steel | 0.8 | 1.5 | 12 |
| M6 | Steel | 1.0 | 2.3 | 17 |
| M6 | Steel | 1.25 | 3.0 | 18 |
| M6 | Steel | 1.5 | 3.5 | 20 |
| M6 | Steel | 2.0 | 3.9 | 20 |
| M6 | Aluminum | 1.0 | 1.5 | 10 |
| M6 | Aluminum | 1.25 | 2.7 | 15 |
| M6 | Aluminum | 1.5 | 3.0 | 18 |
| M6 | Aluminum | 2.0 | 3.9 | 20 |
| M8 | Steel | 0.8 | 1.8 | 17 |
| M8 | Steel | 1.0 | 2.7 | 27 |
| M8 | Steel | 1.25 | 3.5 | 35 |
| M8 | Steel | 1.5 | 4.0 | 37 |
| M8 | Steel | 2.0 | 4.2 | 37 |
| M8 | Aluminum | 1.0 | 1.9 | 17 |
| M8 | Aluminum | 1.25 | 2.3 | 22 |
| M8 | Aluminum | 1.5 | 3.5 | 26 |
| M8 | Aluminum | 2.0 | 4.1 | 35 |
| M10 | Steel | 1.0 | 2.9 | 32 |
| M10 | Steel | 1.25 | 3.7 | 42 |
| M10 | Steel | 1.5 | 4.2 | 45 |
| M10 | Steel | 2.0 | 4.4 | 45 |
| M10 | Aluminum | 1.0 | 2.1 | 18 |
| M10 | Aluminum | 1.25 | 3.4 | 29 |
| M10 | Aluminum | 1.5 | 3.8 | 41 |
| M10 | Aluminum | 2.0 | 4.1 | 35 |
The values are for guidance only and are not binding.
Tests were carried out in steel H320 LA and aluminum EN AW-5754.
| Thread proof load | Pitch x thread | Thread tolerance | Thread coating as an option | Surface finish | PVT as an option |
|---|---|---|---|---|---|
| according to class 10 | 0.8 x d | 6G, 6H | Nycote, Precote | Various surface coatings possible | Yes |
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Application and function
Suitable for: Metal sheets with tensile strength less than 800N/mm²
Sheet metal bottom: Indentation on sheet metal bottom
Pilot hole preparation: Pre-punched pilot hole according to AUTORIV specifications
Die: Use of a special embossing die
Installation: The sheet metal is pressed into the annular groove of the nut and moves into the outer undercut and in the case of thicker sheets into the inner undercut
Outer diameter - pull through force: Medium outer diameter also suitable for aluminum applications, good pull through force
Under-head serration - torque: Lengthwise under-head ribs in the embossing area for high torque absorption
Collar - push-out force: Collars with undercut around the thread and around the outer diameter to provide very high push-out forces
Highlights
Higher torque and push-out forces than with conventional clinch nuts
- No diversity, less stock requirement
- No risk of mix-up (Incorrect fasteners in incorrect application)
- (Re-)use of existing automation / tooling, thus reduction of investment
Greater compensation possible with custom design
- Ensuring optimal pressing: No "NOK pressings" with risk of subsequent complaints and quality costs
- No frequent re-teaching of the robot necessary
- Ensuring high availability and output, thus cost reduction
