The helicoil thread insert assembly consists of three critical elements:

2. Installation tang - Temporary handling protrusion

3. Break notch - Engineered shear point with controlled fracture geometry

Tang Removal Procedure

Utilize certified tang removal tools (e.g., STI Tooling System) to eliminate residual installation protrusions:
Insert removal punch at 0° alignment with thread axis
Apply controlled impact using 16oz ball-peen hammer 
Shear tang at break notch with ≤3 ft-lbs impact energy (verify per tool manufacturer specs)

Post-Installation Quality Verification:

Remove fractured tang using magnetic retrieval tool 

Verify:

Full retention of final coil in parent material thread root
0.002" max radial deformation at insert end
Surface finish ≤125 μin Ra at break point 
Conduct functional gauge test:
GO thread plug gauge (Class 2B) must pass freely
Corresponding fastener must thread without binding (≤0.25 N·m installation torque variance)

Technical References:

NASM 33537: Threaded Insert, Wire Type, Self-Locking
ASME B18.29.1: Wire Coil Screw Thread Inserts
ISO 8854: Prevailing torque type helical coil screw thread inserts