They hold together everything from the most delicate watch to the largest bridge. The world is literally kept from coming apart by screws and bolts, and yet we don’t often give a thought to these ...

Check this out — real metal valve caps! Just like they used to make in the days of the Meriden Triumphs! These are nice replacements for those cheesy plastic ones they give you when you buy a new tire ...

Tapping screws form mating threads in materials they are driven into. There are two basic types: thread forming and thread cutting. The thread-forming screw displaced material around the pilot hole so ...