Böllhoff Galvanised, M4 Steel Threaded Insert Depth 8mm / 6647352

Self-tapping threaded insert. 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.