These 18-8 stainless steel screws have good chemical resistance.

These steel screws have a black-oxide or zinc-plated finish to resist corrosion.

These steel screws are beveled under the head for use in countersunk holes.

18-8 stainless steel screws have good chemical resistance.

These steel screws have alternating high and low threads to minimize cracking and splitting in brittle material such as phenolic and glass-filled plastic.

Stronger and more wear resistant than 18-8 stainless steel screws, these are mildly chemical resistant.

These screws cut threads into drilled holes as they’re turned, so they require less driving torque and cause less stress on material than thread-forming screws.

Cutting wings under the head allow plastic to expand and contract without cracking. A washer made from aluminum and rubber bonded to steel adds a watertight seal.