Screw Core Classifications:
Machine Screws: Standard threads for pre-machined holes. Fully or partially threaded shanks, perfect for precision assembly.
Self-Tapping Screws: Drill, tap, and push without pre-drilled holes. Types include:
Ordinary Self-Tapping Screws: Fit for plastics, wood, thin metal.
Self-Drilling Screws: Drill tip penetrates steel, no pre-drilling needed, boosts efficiency.
Wood Screws: Deep threads, large pitch, sharp teeth for strong wood locking.
Set Screws: Fix part positions, prevent slippage or rotation. End shapes:
Tapered End: High locking force, ideal for hard surfaces.
Flat End: Large contact area, non-damaging.
Concave/Cylindrical End: For positioning or pressing into shaft holes.
Structural screws: High-strength, replace bolts in steel structures, fast install.