Plastite Screws Plastic Screw Fasteners Pan Head Screw

PLASTITE screws are designed to facilitate thread-forming in less-compressible plastics while providing high resistance to strip-out and pull-out.
Features
Tri-roundular configuration that allows displaced material to cold flow back into relief areas.
45° profile allows the thread to penetrate deeply into a plastic material
Single lead design and narrow helix angle lower drive torque and failure torque in stiffer plastics
Benefits
Reduces the possibility of boss failure
Increases product reliability
Eliminates need for inserts and lock washers
Minimizes radial stress
Allows design of thinner bosses
Generates strong mating threads
Resists vibration loosening
Reduces probability of strip-out and pull-out
Achieves wide differentials between drive and fail torque
Creates less stress on the boss
Ever Hardware provides custom-made fasteners and customizable packaging.

Galvanization, or galvanisation, (or galvanizing as it is most commonly called in that industry), is the process of applying a protective zinc coating to steel or iron, to prevent plastic screws rusting. The most common method is hot-dip galvanizing, in which parts are submerged in a bath of molten zinc. Galvanizing protects in three ways:
It forms a coating of zinc which, when intact, prevents corrosive substances from reaching the underlying steel or iron.
The zinc serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will still be protected by the remaining zinc.
The zinc protects its base metal by corroding before iron. For better results, the application of chromates over zinc is also seen as an industrial trend.