high quality drywall screw factory

Normal size:

3.5x13 3.5x16 3.5x19 3.5x25 3.5x32 3.5x35 3.5x38 3.5x50…

3.9x16 3.9x19 3.9x25 3.9x32 3.9x35 3.9x38 3.9x45 3.9x50...

4.2x16 4.2x19 4.2x25 4.2x32 4.2x35 4.2x38 4.2x45 3.5x50…
4.8x16 4.8x19 4.8x25 4.8x32 4.8x38 4.8x45 4.8x50 4.8x60 4.8x70 4.8x80 4.8x100

Thread:

a. coarse thread, hardened as require.

b. fine (twin-fast)/High-Low thread as require.

Usage:  Having a high tensile strength value and are durableenough to handle repeated assembly and disassembly so often used to fasten sheet metal composite materials. woods and plastics.