Product Description
The Heli-Coil 1191-4CN375 is a high-performance free-running wire thread insert engineered to deliver permanent, wear-resistant internal threads in lightweight metals and composite assemblies. Formed from cold-drawn Nitronic 60stainless steel wire with a precision diamond cross-section, this tanged insert provides exceptional galling resistance and high-temperature performance without requiring liquid lubricants. Featuring a streamlined free-running configuration, it allows male fasteners to thread smoothly without rotational friction until final clamping torque is applied. The flexible coil profile dynamically adapts to the host material, distributing structural stress evenly across the tapped hole to deliver superior stripping protection and long-term joint integrity.
Free-Running Geometry Allows mating bolts to spin freely through the helical profile without prevailing torque until final torque is established.
Nitronic 60 Stainless Steel Construction Advanced austenitic alloy wire delivers inherent anti-galling and anti-seizing properties, even in dry assembly conditions and elevated temperatures.
Standard Driving Tang Features a robust drive tang integrated into the leading coil for reliable manual or automated tool engagement and exact depth placement.
Uniform Load Distribution Flexible wire coils flex independently under load, eliminating stress concentrations and protecting soft alloys from thread stripping.
Product Specs
- SKU:
- 1191-4CN375
- Thread Size (Inch):
- 0.250
- Thread:
- 1/4-20 UNC
- Overall Insert Length (Decimal Inch):
- 0.375
- Tang:
- Tanged
- Material:
- Nitronic 60 Stainless Steel
- Number of Free Coils:
- 5-3/4
- Length to Diameter Ratio:
- 1.5:1 (1.5D Nominal Length)
- Coating/Finish:
- None (Plain)
