HF109 series self-clinching studs are heavy-duty, high-tensile strength fasteners manufactured from medium carbon alloy steel and heat-treated to meet a minimum tensile strength of 1040 MPa, corresponding to property class 10.9. They are designed for installation in steel or HSLA steel sheets with a maximum hardness of HRB 89 or HB 180 and a minimum thickness of 1 mm. The studs feature a large head diameter that spreads compressive stress to improve pull-through resistance. The HF109-M5-25 variant has an M5 x 0.8 thread, a length code of 25 mm, and is identifiable by its property class 10.9 head marking. All variants in the HF109 series meet ISO 898-1 specifications where applicable and include the PEM stamp for authenticity.
PEM® self-clinching studs are installed by placing them in properly sized holes in the sheets and squeezing into place with any standard press. The squeezing action embeds the head of the stud into the sheet. The metal displaced by the head flows smoothly and evenly around the ribs and into the annular groove - creating a flushhead assembly and securely locking the stud into the sheet with high torque-out and pushout resistances.
HFH (heavy-duty) Studs replace weld studs with easier installation at lower costs. The large stud head which projects above the sheet material distributes the axial tightening force over a large area thereby improving pull through resistance .
HFG8 and HF109 (heavy-duty high tensile strength) Studs are manufactured for the most demanding applications from medium carbon alloy steel, then heat-treated to high strength and hardness qualities
| PennEngineering® | bisco industries | |
|---|---|---|
| Product Category | Studs | Studs |
| Product Number | HF109-M5-25ZI | HF109-M5-25ZI |
| Product Name | High-Tensile Strength Studs - Types HFG8, HF109 - Metric | Self-Clinching Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | Metric | Metric |
| Metric | M5 | M5; M5 x 0.8 |
