[M5 gold]

[M3 black]

[M4 red]

[M4 blue]

Hex nuts are used with fitting screws and bolts to help protect items.
They have a hexagonal body that can be held with a wrench to tighten and pivot in tightening applications.
Used in all kinds of precision machinery, classification instruments, instruments, electronics, consumer electronics, communications products, lights and more.
A great replacement for industrial and construction fasteners, also can be an important accessory in your daily life.
Convenient and easy to install.
Note:
Manual measurement allows for minor errors. Thank you!
Item color displayed in photos may be slightly different on your computer monitor since monitors are not calibrated