On installation the bottom internal threads of the insert are cold rolled to expand the mating external threads into the base material locking the insert in place.
TIME-SERT® M7 x 1 x 14mm Inserts - Pack of 10
TIME-SERT® M7 x 1 x 10mm Thread Repair Insert - M7 Helicoil Replacement
TIME-SERT® M7 x 1 x 14mm Thread Repair Insert - M7 Helicoil Replacement
Sealey Brake Bleed Screw M7 x 28mm 1mm Pitch Pack of 10 - BS7128
1x Pack Of 10 Sealey Brake Bleed Screw M7 x 28mm 1mm Pitch - BS7128