what are lag screws?

Lag screws are some of the trickiest screw types.
Also known as lag bolts, lag screws are commonly used to connect heavy-duty wood and other materials that bear heavy loads.
They are different from other more common screws such as wood screws, sheet metal screws and self-tightening screwsDrilling screws.
Although some screws overlap in the area of the other screws, each has its own use.
Wood screws, for example, are used to connect wood to wood.
They have thick threads, but do not extend up all the time.
They are different from lag screws because they go through the wood when they are screwed in, and lag screws require you to drill holes first.
In addition, the lag screw uses a nut on one side to help hold things together;
The tight fit of wood screws eliminates the need for nuts.
However, since Wooden screws are usually smaller than lag screws and do not use nuts, they cannot withstand the load that lag screws can afford.
Wood screws and lag screws are different from metal sheet screws, which have threads on the shaft.
When you screw through the metal, you need them even if you attach the metal to the wood. Self-
Drilling or self
Self-tapping screws are like metal sheet screws, but they cut their own holes when they are pushed in, so you don\'t have to drill holes for them first.
Wood screws, sheet metal screws and self
There are multiple head types for self-tapping screws, and lag screws are only available for hex heads.
To drive the screw using a hexagonal head, you need to use a nut drive or a ratchet.
Use a hexagonal head when a large amount of torque is required.
At the same time, depending on the drive, other types of headers are compatible with various drives.
Some have slotted heads and some have Philips heads.
The Torx drive screw is an exception.