Helical Insert 304 Stainless Steel 5/16-18 UNC Right Hand Internal Thread 0.469 Inch Length Free Running Heavy Duty Pack Of 12 For Automotive Machinery And Industrial Repair And Reinforcement

Stainless 304 Helical Inserts for 5/16-18 UNC, 0.469 Length
✔️ Pack of 12; 304 stainless, right-hand internal thread.

These 304 stainless steel helically coiled inserts are designed to repair stripped or damaged threads in metal parts. They’re ideal for automotive, machinery, and industrial repair projects to reinforce tapped holes and extend service life.

✅ 5/16-18 UNC internal thread size
✅ Right-hand thread direction for standard fasteners
✅ Free running coil design for easier installation
✅ Tensile strength 200,000-250,000 PSI; Rockwell hardness C43-C50
✅ Pack of 12 for ready-to-use repairs

💡 What is a helically coiled insert used for in metal repair and reinforcement?

These handy inserts help restore damaged threads and reinforce tapped holes in metal parts.

• thread repair for worn holes in cast, aluminum, or steel
• improved load distribution and resistance to pull-out
• works with standard drill and tap sizes like 5/16-18 UNC
• easy to install with common tools and reusable in many repairs