These metric screws have a silicone O-ring that prevents leaks and seals out contaminants. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic.

A nylon patch bonded to the threads adds friction to resist loosening from vibration.

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

The threaded stud installs in threaded holes.