FHS-440-8 is a flush-head self-clinching stud designed for installation in steel or aluminum sheets as thin as 0.020 in. (0.51 mm), recommended for materials with Rockwell B hardness of 70 or less and Brinell hardness of 125 or less. It features a #4-40 thread, an unthreaded length of 0.176 in., and installs with a minimum hole size of 0.141 in. The stud head projects above the sheet by 0.025 in. (0.64 mm), providing secure anchoring through displaced material flow. It is manufactured in steel or stainless steel and includes a dimple in the head to identify it as a TFH/TFHS series variant.
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.
FH (flush-head) studs are available in aluminum, steel, or stainless steel . They are also available unthreaded on special order.
| PennEngineering® | bisco industries | |
|---|---|---|
| Product Category | Studs | Studs |
| Product Number | FHS-440-8 | FHS-440-8 |
| Product Name | Self-Clinching Threaded Studs - Type FH/FHS/FHA - Unified | Threaded Rods and Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | English | English |
| Inch | # 4 | # 4 |
