The waterproofing effect of screws with waterproof caps depends on the following factors.
1. The material and thickness of the gasket. Rubber gaskets are softer than plastic gaskets and can adapt to uneven surfaces and improve sealing performance.
2. The cooperation between the washer and the screw head. The washer should fit closely with the screw head without gaps or cracks, which will affect the waterproof effect.
3. The size and depth of the screw hole should match the screw rod. It should not be too large or too small, which will cause uneven stress or deformation of the gasket and affect the waterproof effect.
4. Tightening strength of the screws. Tighten the screws to an appropriate level. If they are too tight or too loose, the gasket will be excessively squeezed or loose, which will affect the waterproofing effect.
Screws with waterproof caps are used to provide additional waterproof protection during installation.