A brief discription and explaination of how to tell a Metric bolt from an SAE inch bolt.
Use off the shelf hardware to make a replacement long thumb screw (thumb knob) for your GoPro Hero, Hero2 or Hero3. You need (1) 10-32 x 2″ thumb screw, (1) 10-32 x 1″ nylon tapped threaded spacer and (1) 10-32 x 1/4″ nylon tapped threaded spacer.