20pcs Self Tapping Slotted Screw Metal Thread Insert Nuts for Helical Repair M4 x 8mm Set

• EASY TO INSTALL: These self -tapping thread inserts has self-tapping ability, does not need to be pre-tapped, can be directly used by the installation tool to screw it into a specific hole.
• STURDY: These threaded inserts have a good connection performance, can enhance connection strength and improve connection condition.
• WEAR-RESISTANCE: Good wear-resistance, can be used for parts that requires frequent removing.
• SAFE: It has the ability of strong vibration resistance, which can prevent loose.Can be used in many different places.
• HELP TO MAINTENANCE: A damaged screw hole can be used as normal after installed a thread insert.

Features: These self tapping thread inserts can be installed directly and do not need you to tap a thread first. They are used in low strength materials such as aluminum, can avoid thread damage and get a good connection performance, to enhance connection strength and improve connection condition. Used for parts that requires frequent removing, it can greatly improve service life and wear-resistance of screw thread. It can prevent screw from getting loose, especially used for products requiring high coefficient of insurance. Easy to maintenance, install a thread insert into a damage screw hole, then the screw hole can be used as normal, in order to avoid workpiece loss. Specifications: Material: Metal Inner Thread Size: M4(diameter) x 0.7(pitch) x 8mm(length) Outer Thread Size: M6.5(diameter) x 0.75(pitch) Drilling Diameter: 5.8~5.9mm(plastic); 6.0~6.1mm(aluminum alloy); 6.1~6.2mm(cast iron) Min. Drilling Depth: 10mm Quantity: 20pcs Weight: 20g(approx.) Package Includes: 20 x Threaded Inserts