Thread locker

Threadlocker stops a bolt from working loose: choose it according to whether you will want to undo it easily or not.

Medium or strong

Blue, medium strength (15 N·m breakaway torque), comes apart easily. Red gel (25 N·m) and green (29 N·m) are high-strength threadlockers, for assemblies that must not move again. For steel, stainless steel and aluminium, in a 50 ml bottle, made in France.