Product Category Search
Top rated crack repairing inserts
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Best overall
Helicoil Thread Repair Kit - M6x1.0
Industry-standard wire thread inserts for repairing damaged threads in metal; versatile and easy to install with included tools.
- High durability
- Easy installation with kit
- Widely compatible
- Requires drilling and tapping
- Limited to through holes
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Best for wood/plastic
E-Z Lok Threaded Insert - 8-32
Knurled brass inserts designed for soft materials like wood and plastic; provide strong threads without needing a special tool.
- No special tool needed
- Good for soft materials
- Corrosion resistant
- Limited to low-strength applications
- Not for high-torque
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Best for heavy-duty
Perma-Thread Wire Thread Insert - M8x1.25
Heavy-duty stainless steel thread inserts for high strength repairs; excellent for automotive and industrial applications.
- Very high strength
- Stainless steel
- Reliable in harsh environments
- Installation requires training
- More expensive
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Best precision
Time-Sert Thread Repair Kit - M10x1.5
Solid wall thread inserts offering superior holding power and precise thread alignment; ideal for high-cycle fasteners.
- Extremely secure
- No special tool needed
- Reusable install tool
- Higher cost
- Limited sizes in single kit
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Best locking
Stainless Steel Key-Locking Insert - 1/4-20
Key-locking design prevents rotation in soft materials; ideal for repeated disassembly in wood or plastic.
- Anti-rotation keys
- Good for repeated use
- Corrosion resistant
- Requires larger hole
- Not for very thin materials
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Best for plastic
Brass Threaded Insert for Plastic - M5x0.8
Economical brass inserts for plastic parts; heat-staking or press-fit installation provides strong threads.
- Low cost
- Simple installation
- Works with thermoplastics
- Not for high-temperature
- Limited pull-out strength
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Best value
Heavy Duty Steel Thread Insert Kit - 3/8-16
Complete kit with steel inserts for repairing stripped threads in steel and aluminum; good balance of quality and price.
- Good value
- Includes drill and tap
- Works on hard metals
- Slightly lower durability
- Kit may have limited sizes