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.
The first Tacoma Narrows Bridge was a Washington State suspension bridge that opened in 1940 and spanned the Tacoma Narrows strait of Puget Sound between Tacoma and the Kitsap Peninsula. It opened to traffic on July 1, 1940, and dramatically collapsed into Puget Sound on November 7, just four months after it opened.
Noting that we now live in an era of “confusion and ill-conceived stuff,” Ammunition design studio founder Robert Brunner, speaking at Gigaom Roadmap, said that by adding connectivity to everything and its mother, we aren't necessarily doing ourselves any favors, with many ‘things’ just fine in their unconnected state.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.