My Dad.
If they are self tapping screws, the drill bit is as thick as the solid barrel of the screw. If you want the screw to go through easily to have a nut on the other side, then the drill bit is slightly larger than thread size.
Archimedes of Syracuse invented the water screw, and Sir Joseph Whitworth invented the first standard screw thread system.
Historians do not really know how or why the screw was invented. This is because the use of screws predates our records.
a clockmaker
Husnain Ali khan invented Screw Jack in 1980 WRONG invented by Leonardo da vinci in 1450 more recent I have worked with screw jacks since 1960
A self-tapping screw can be used to join two pieces of plastic or metal with simple holes drilled into them. A "normal" screw requires one of the holes to be "tapped" - a spiral has to be cut into one of the holes to accept the screw. Tapping holes is something of a game of skill; the tapping tools use very hard, brittle steel and it's easy to break a tool in the hole.
Use a self tapping screw, and screw the top plate into the grid for the ceiling tiles.
A self-tapping screw can be used to join two pieces of plastic or metal with simple holes drilled into them. A "normal" screw requires one of the holes to be "tapped" - a spiral has to be cut into one of the holes to accept the screw. Tapping holes is something of a game of skill; the tapping tools use very hard, brittle steel and it's easy to break a tool in the hole.
A self-tapping screw can be used to join two pieces of plastic or metal with simple holes drilled into them. A "normal" screw requires one of the holes to be "tapped" - a spiral has to be cut into one of the holes to accept the screw. Tapping holes is something of a game of skill; the tapping tools use very hard, brittle steel and it's easy to break a tool in the hole.
It is a self drilling, self tapping screw for steel to steel applications. For wood to steel applications, there are reamer tek screws available.
Just go to a store that has screws and ask an assistant for a self tapping screw if you are drilling a new hole. And then go home and drill it in with an electric screwdriver.
Self tapping screws are made by a few steps. You have to made the medal and then put in the details.
Archimedes invented Archimedes' screw.
Use metric 6 mm or 1/4 inch self tapping screw to attach plate. ( North America only )
If they are self tapping screws, the drill bit is as thick as the solid barrel of the screw. If you want the screw to go through easily to have a nut on the other side, then the drill bit is slightly larger than thread size.
The Archimedes screw was invented in 250 B.C.
Archimedes of Syracuse invented the water screw, and Sir Joseph Whitworth invented the first standard screw thread system.