Release time：2020-01-16 18:44 Browse：
The thread length of extended self-drilling screws relates to several factors, and longer isn't necessarily better. The optimal length should be determined based on practical requirements:
Material Thickness
Thread length should match the thickness of fastened materials. Too short may provide insufficient grip, while too long may affect fastening performance or cause material deformation.
Load Requirements
High shear force applications (e.g., steel structures) require longer threads for increased contact area
Light-duty applications (e.g., thin sheets) can use shorter lengths
Self-Drilling Performance
Excessive length may cause drilling difficulties or material damage
Installation Method
Manual installation: Avoid excessive length
Power tool installation: Can accommodate longer threads
Material Hardness
Soft materials (wood/plastic): Slightly shorter acceptable
Hard materials (metal): Require longer threads
