Böllhoff Galvanised, M4 Steel Threaded Insert Depth 8mm | 56000000078/01

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.