To prevent unwanted removal, these screws have a tamper-resistant Torx drive—also known as a pin-in Torx drive—that makes them difficult to unscrew without special tools. An O-ring under the head blocks leaks and seals out dust and dirt.

A rubber O-ring prevents leaks and seals out contaminants. Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic.

An O-ring under the head prevents leaks and seals out contaminants.

With an O-ring under the head, these metric screws seal out leaks and contaminants while also preventing unwanted removal.

With an O-ring under the head, these screws prevent leaks and seal out contaminants.

A rubber O-ring under the head creates a seal that withstands liquid and gas pressure.

These steel screws are available with corrosion resistant finishes. A rubber-bonded washer compresses to form a watertight seal. They save you time and effort by drilling their own holes and fastening in a single operation.

Made from 410 stainless steel, these screws are strong, wear resistant, and mildly chemical resistant.

18-8 stainless steel screws have good chemical resistance.