BaerCoil® “screw grip” thread inserts, or locking inserts, have one or more polygon-formed windings, which have a clamping eff ect on the flanks of the inserted screw. We only recommend using screws with a higher screw property class (from 8.8 on), because of this screw locking or screw clamping effect. An elastic and flexible frictional connection is formed. The clamping torque is comparable to the indications in DIN 267 Part 15 and ISO 2320. BaerCoil® “screw grip” thread inserts are predominantly used in areas where screw connections must remain tight while exposed to tremors, constant vibrations and movements. Screw grip inserts are red-colored. As always, we are here to help, so if you don’t see the exact product or size you need, please contact us for assistance.