MATERIALS: New PEM®high tensile strength studs provide robust fastening solutions for the most demanding applications requiring superior thread strength and hardness. These Type HFG8TM (unified) and Type HF109TM (metric) clinch studs are specially heat-treated to achieve greater tensile strength up to Grade 8 (unified) and Property Class 10.9 (metric) meeting 150 ksi/1040 MPa minimum. Their large-diameter heads serve to reduce compressive stress on panels and promote development of full thread strength.These carbon alloy steel studs have been introduced in thread sizes up to 5/16-18 / M8 and in lengths up to 1 inch/25 mm. (Longer lengths can be specially ordered.) Appropriate sizes of the Grade 8 and Property Class 10.9 products meet SAE J429 and ISO 898-1/SAE J1199 specifications, respectively. They additionally carry the appropriate head markings.
The studs install permanently in carbon steel or HSLA steel sheets as thin as .040 inch/1.5 mm with hardness up to HRB 89 on the Rockwell “B” scale. Installation is accomplished easily (without welding) using standard punch and anvil or automated equipment. The studs enable reliable, secure, and simplified attachment of components or assemblies with only a mating part necessary to complete the process.
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