Product Description
The Heli-Coil® NAS1130-4F-15 is a tangless, free-running wire thread insert precision-manufactured from 304 stainless steel with a dry film lubricant coating. Engineered to meet stringent aerospace NAS specifications, it establishes permanent, high-strength .250-28 (1/4-28) UNF internal threads in low-density parent metals like aluminum, magnesium, and advanced composites. Its innovative tangless design completely eliminates tang break-off and retrieval operations, accelerating production throughput while preventing foreign object debris (FOD) hazards in mission-critical applications. The applied dry film lubricant coating significantly reduces installation friction, prevents thread galling, and ensures smooth fastener engagement throughout the operational lifecycle.
Tangless Wire Construction eliminates tang removal and vacuum retrieval steps, shortening assembly cycles and completely preventing foreign object debris (FOD) hazards in sensitive assemblies.
Dry Film Lubricant Coating lowers driving torque, reduces friction during installation, and prevents thread galling and seizing under mechanical stress.
304 Stainless Steel Material delivers high tensile strength, structural integrity, and long-lasting protection against corrosion in demanding environments.
Free-Running Thread Profile permits standard male fasteners to thread smoothly through the coil without applying friction locking torque.
.250-28 (1/4-28) UNF Threading reinforces soft parent metals and repairs damaged internal fine threads in aerospace and defense components.
Product Specs
- SKU:
- NAS1130-4F-15
- Thread Size (Inch):
- .250-28 (1/4-28)
- Thread:
- UNF
- Overall Insert Length (Decimal Inch):
- 0.375
- Tang:
- Tangless
- Material:
- 304 Stainless Steel
- Number of Free Coils:
- 7-1/2
- Length to Diameter Ratio:
- 1.5:1
- Coating/Finish:
- Dry Film Lubricant
