Bontrager Thumb Screw Pack

Hands are the only tools needed
Trek Thumb Screws come in a pack of four to securely, quickly and easily mount bags to your bike with integrated mounting holes.

Product details
Designed to mount bags on Trek bikes with integrated frame mounts.
No tools required – install and remove using only your hands
M5 thread size with 0.8 mm thread pitch at 12 mm long and 22 mm wide head
Compatible with most bikes with integrated frame mounts