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A 5-point can drill through 0.5 in (12.7 mm) of steel, for example. self-tapping machine screw: A self-tapping machine screw is similar to a machine screw, except the lower part of the shank is designed to cut threads as the screw is driven into an untapped hole.
A self-tapping screw is a screw that can tap its own hole as it is driven into the material. More narrowly, self-tapping is used only to describe a specific type of thread-cutting screw intended to produce a thread in relatively soft material or sheet materials, excluding wood screws .
Self-tapping pocket screws are used for pocket hole joints. Pocket screws are generally more expensive, but they are needed for a tight, strong joint. Pocket screws have a wide washer head to spread the load for a firm bond, and prevent screwing too far into the joint and cracking the wood.
Figure 1 of the original patent for the molly bolt, U.S. Patent No. 2,018,251. The molly bolt was patented in 1934 by George Frederick Croessant. [3] Although his patent acknowledges that expandable fasteners of this general kind were already known, Croessant's patent is intended to provide "an improved and adequate anchoring grip that may be retightened if necessary and that will permit ...
Related: A Man on the Inside star Ted Danson just wants to 'try to be funny at every age' Host Jennifer Hudson asked Danson if he responded. "No," he answered. "I kept going just to make sure that ...
The performances have become the norm for Philippi's friends, family — and their kids. "I mean, this year we've done 11 songs, so [the kids are] just like, 'Oh, we're having another night where ...
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