The blue Aluminum Thumbscrew for GoPro (3-Pack) from Revo provides a more rugged alternative to the regular plastic thumbscrews included with most GoPro HERO housings. Crafted entirely from aluminum, they're designed to endure high-intensity activities like skydiving and freestyle motocross. A rubber O-ring on the threaded stud prevents the thumbscrew from scratching your GoPro mount, and a hexagonal acorn nut provides a locking female thread. The set consists of two short aluminum thumbscrews and one long one.
The threaded screw is the standard diameter used by all original GoPro HERO housings and frames, and will also work with most mounts and accessories built around the GoPro mounting system.