Phillips Drive Bugle Head High-Low/Hi-Low Thread Phosphate Coating Black Finish Drywall Screws
Dry wall screws are usually bugle head screws with spaced threads and sharp points. Classified by the pitch of thread, there
are two common kinds of dry wall screw threads: fine thread and coarse thread. The drywall screw equipped with drilling point
is used for attach metal studs.
There is also a special type of thread, high and low thread
High-Low Thread style Drywall screws exceed the holding power of standard drywall screws in wood due to their design of alternating high and low thread heights. They can also be used with metal studs up to 20 gauge.