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A screw is a wide-encompassing type of hardware fastener that attributes its mechanical capabilities to the helical groove that extends around the circumference of the device's shank. These threads provide the friction and traction that serves a screw's purpose: to assemble or position two workpieces in relation to each other. While used synonymously, screws and bolts are not mechanical clones.
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There are several techniques for joining plastic parts. Equipment cost and labor for each method vary considerably. Most techniques have limits on the sizes and types of plastic that can be joined.
The latest hardware is smaller, installs faster, and holds better. Special Products Manager PennEngineering Fastening Surface-mount fasteners are supplied on tape and reels, and install using standard...
Inserts are classified as two general types: those held in place by external threads and those that use some means other than threads (knurls, grooves, interference fit) for their holding power.
Rivets and pins can be used as inexpensive alternatives to threaded fasteners in automated assembly. Pins are used where ease of disassembly is desired, while disassembly usually destroys rivets.
Captive, or self-retained, nuts are multiple-threaded fasteners used on many thin materials. They are good in blind locations, and can generally be attached without damaging finishes. Captive nuts can...
