KUNGJUER Helicoil Metric Thread Repair Insert Kit，M12x1.5mm

The KUNGJUER Helicoil M12x1.5 Thread Repair Insert Kit is a full repair set designed to restore stripped or damaged M12x1.5 internal threads quickly and create stronger, wear-resistant threads in soft metals.

This compact kit bundles the drill, tap, inserts, installation and break-off tools, hex wrench and storage case you need to repair M12 threads on engines, brackets, housings and other automotive or light-industrial components. Parts are sized for M12x1.5 rethreading and are intended for use in materials like aluminum, iron, carbon steel, bronze and magnesium where original threads have become worn or damaged.

How does this kit rebuild a stripped M12x1.5 thread?

The kit uses a helicoil-style stainless-steel insert that is installed into a slightly oversized pilot hole created by the supplied drill. After tapping the hole to accept the insert, the coil is wound in place to form a new internal thread profile that matches M12x1.5 fasteners.

• Includes 12.4 mm twist drill to open the damaged hole
• HSS screw tap cuts the correct internal thread for the coil
• Stainless steel helicoil inserts recreate a durable M12x1.5 thread
• Installation and break-off tools seat and trim the insert cleanly

What tools and parts come in the kit and how do they help?

The kit is packaged with every specialized tool needed for one or multiple M12 repairs, so you won’t need to source extras. Each component is sized and marked for easy identification, and the tools are built for repeatable, safe rethreading work.

• 1 twist drill and 1 HSS screw tap for hole prep and thread cutting
• 10 stainless-steel helicoil inserts sized M12x1.5 for repeated repairs
• Installation tool and breaking pin to seat and finish each insert
• Hex wrench, ergonomic handle, and compact iron storage box for organization

Which materials and applications are suitable for these inserts?

The helicoil insert system is especially useful in softer or worn materials where original threads strip under load. Use it for engine blocks, aluminum housings, gearbox covers, and other components where restoring thread strength and fatigue life matters.

• Recommended for aluminum, iron, carbon steel, bronze and magnesium
• Commonly used in automotive, motor repair, machinery and maintenance
• Creates a stronger internal thread than the worn native material
• Protects tapped threads from future wear and repeated bolt changes

How easy is the kit to use for a DIY repair or a professional shop?

Components are engineered for straightforward, repeatable installation: the 135° drill clears the hole quickly, the HSS tap offers precise thread cutting, and the installation tool ensures consistent seating. The engraved tools and compact case speed workflow and reduce errors.

• Drill and tap have engraved size marks for quick identification
• Ergonomic rubber handle improves grip during hand operations
• Iron storage box keeps all pieces secure and portable between jobs
• Ten inserts let you perform multiple repairs without restocking

This kit is intended for mechanics, maintenance technicians, hobbyists and anyone who needs to restore or strengthen M12x1.5 threads without replacing large parts. It’s practical for home garages and professional shops alike — ideal when a stripped thread would otherwise require expensive replacement of a component. Follow proper instructions and safety practices for drilling and tapping; the kit supplies the hardware and tools, while correct technique ensures a lasting repair.