Heli-Coil ® Quick Reference Guide #3 How to Choose Heli-Coil ® Wire Threaded Insert Solution PROBLEM / NEED SOLUTION Heli-Coil Inserts OEM Design X Thread Repair X TYPE Tanged Tangless Hard, Reusable threads X X Size Requirement Range >M6 and >1/4“ X High FOD Concern X Shallow Blind Hole X Eliminate Secondary Break Off Operation and Tang Accountability X Meet Applicable NASM, and NAS Standards (Applicable Aerospace and Military Specs) X X Thin Wall Applications X Free Running Screw Lock Unlimited Reusability X Enhanced Thread Strength X X Prevailing Torque Feature X Adjustment or Vibration Applications X Eliminate lock wiring, nuts or washers, chemical compounds or other locking mechanisms X INSERT MATERIAL TYPE 304 Stainless Steel Inconel X-750 Nitronic 60 Phosphor Bronze Titanium Enhanced Thread Strength X X X X X General Industrial OE Applications X General Repair X RoHS Compliant X X X X Temperature Range to 800 F X X X High Temperature Appplications Range to 1,000 F X FOD Free and Extreme Galling Concerns X Basic Corrosion Resistance X X X Salt Water Application X Electrical Connectivity X X X X Low magnetic Permeability X X Vacuum Environments X X Particle Free X Superior Strength to Weigh Ratio X MS / NAS Certification X FINISH / PLATING Primer Free Dry Film Lubricant Cadmium Silver Color Coding RoHS Compliant X X X Galvanic Corrosion between insert and parent material X Anti-galling X Eliminate need for wet primers and difficult to apply epoxies X MS / NAS Approval (Military Specification) X X Insert Identification / Verification Of Installation X Anti-galling Of Threads At High Temperatures Up to 1200 F X PACKAGING Bulk Strip Installation In Limited Access Locations/Low Volume Production X Handling Ease / High Volume Production X Free Running Screw Lock Tanged Tangless