M4 Headless hex grub screw bolt M4x4mm
Grub Screw also called a set screw, headless bolt. A hex key or Allen key is a tool of hexagonal cross-section used to drive bolts and screws that have a hexagonal socket in the head.
Headless hexagon socket screw, can be screwed with 1.5MM hex wrench.
12.9 level screw
The total length of the screw is 4MM
The length of the thread is 4MM
Single weight 0.087 g / piece