Screw Core Classifications:
Machine Screws: Standard mechanical threads for pre-threaded holes, fully or partially threaded, perfect for precision assembly.
Self-Tapping Screws: Drill, tap, and push sans pre-drilled holes. Subcategories:
Ordinary Self-Tapping: For plastics, wood, thin metals.
Self-Drilling: Drill tip penetrates steel, negates pre-drilling, enhancing efficiency.
Wood Screws: Deep threads, large pitch, sharp teeth for wood, ensuring strong grip.
Set Screws: Fix parts, avert slippage or rotation. Various ends:
Tapered End: High locking force, ideal for hard materials.
Flat End: Large contact, non-damaging.
Concave/Cylindrical End: Positioning or pressing into shaft holes.
Structural screws: High-strength, heat-treated, replacing bolts in steel, speeding installation.