Böllhoff Galvanised Steel Threaded Insert, 12 mm diameter 11.4 mm 15 mm

Set of inserts with an inner and outer thread.
Equipped with a cutting slot, these inserts are suitable for most applications.
In most materials, these inserts contract close to the slot and slightly inwards due to the spring-effect, which locks the screw.
Used throughout metal, plastics and composite materials industries.