STN Clinch Stud
for automated feeding and processing
Clinch stud / screw for highest torque and push-out forces. This clinch stud with outstanding performance holds better than any other clinch stud on the market, especially in thin and soft metal sheets. In use at car manufacturer OEMs in the USA. New development, other OEMs to follow.
Sheet thickness - Used for metal sheets with thicknesses from 0.7mm to 2.5mm
Thread size - M6, M8, M10
Workpiece material - Steel, aluminum, copper
Outer diameter - Large
Pull-through force - High
Torque - Very high
Push-out force - Very high
| Thread (d2) | Head diameter in mm (d1) | Head height in mm (l1) | Collar height | Sheet thickness in mm (s) | Pilot hole diameter in mm (Ø -0,1) | Thread length in mm (l3) |
|---|---|---|---|---|---|---|
| M6 | 14 | 3.80 | 0.70 | 0.70 - 2.50 | 6.20 | 16 / 20 / 25 / 30 / 35 / 40 /45 |
| M8 | 16.50 | 3.80 | 0.70 | 0.70 - 2.50 | 8.20 | 20 / 25 / 30 / 35 / 40 / 45 / 50 |
Tolerances according to ISO 2768-m.
Special design - We adapt a wide range of parameters relating to the area of application, geometry, properties and surface to meet your requirements.
| Thread | Material | Sheet thickness (mm) | Push-out force (kN) | Torsional strength (Nm) |
|---|---|---|---|---|
| M6 | Steel | 1.15 | 0.70 | 10 |
| M8 | Steel | |||
| M10 | Steel |
These values are for orientation only and are not binding.
Tests were conducted in steel 20MnB4.
| Thread proof load | Thread length | Thread ends | Thread tolerance | Thread coating as an option | Surface protection |
|---|---|---|---|---|---|
| according to class 8.8, 9.8, 10.9 possible | according to customer requirements | according to standard, as well as MaThread | 6g, 6h | Nycote, Precote | Various surface coatings possible |
General Information
The clinch stud, also known as a self-clinching stud or press-fit stud / screw, is a fastener that is pressed into thin sheet metal to create a fastening option for adjacent components.
By cold forming the surrounding material, the clinch stud is set into a prefabricated pilot hole in the component. During the press-in process, the head underside of the stud is anchored in the sheet metal.
Clinch studs offer a fast and reliable method of fastening components in thin materials, especially when conventional threads cannot be used.
The STN clinch stud is also an ideal replacement for welding fasteners.
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Application and Function
Suitable for: Insertion in 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: Large head 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 studs
- 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, possible with suitable AUTORIV thread end
- 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
- Easier positioning compared to studs that are placed in narrow pilot holes
- Lower chip formation due to abrasion of the thread on the edge of the pilot hole
