Heli-Coil R11855 Thread Repair Insert - 5/16-18 12-Pack

The Heli-Coil R11855 thread repair insert provides a reliable solution for restoring damaged or worn 5/16-18 threads in aluminum, magnesium, and other soft metals. Each precision-wound stainless steel coil insert creates stronger-than-original threads that resist stripping and cross-threading.

Key Features:

• Thread size: 5/16-18 inch coarse thread
• Insert length: 0.469 inch (1.5x bolt diameter for optimal strength)
• Stainless steel construction for corrosion resistance
• Creates permanent, wear-resistant threads
• 12 inserts per package for multiple repairs

Each package includes 12 thread inserts conveniently stored in a clear plastic display box marked with the part number and thread specifications. The 1.5x diameter length provides sufficient thread engagement for most applications, ensuring the repaired threads meet or exceed the strength of the original fastener. Ideal for automotive, industrial, and maintenance applications where thread damage occurs in softer base materials.