Product Description
The Heli-Coil MS21209C0215L is a high-performance, military-standard screw-locking wire thread insert designed to generate resilient, high-strength internal threads within structural parent metals. Precision-formed from cold-drawn 304 stainless steel wire with a distinctive diamond-shaped profile, this tanged insert utilizes an integrated series of chordal straight segments along its internal coils. These flat sections expand outward when a male bolt enters the system, exerting a continuous, predictable prevailing torque that grips the fastener tightly. This specialized design provides permanent vibration resistance, preventing dangerous rotational loosening under harsh cyclic stress without necessitating external locking wires, tabs, or washers.
Self-Locking Internal Gripping Deformed chordal coils create structural prevailing torque to reliably secure male fasteners in high-vibration applications.
Tanged Production Anchor Features a standardized driving tang positioned on the leading installation coil for positive, controlled tool engagement.
High-Tensile CRES Protection Constructed from premium corrosion-resistant steel work-hardened past 200,000 PSI to defend soft parent metals against thread erosion and stripping.
Dry Film Lubrication Pre-coated with a dry film lubricant to optimize seating torque, mitigate galling, and provide uniform clamping pressure during assembly.
Product Specs
- SKU:
- MS21209C0215L
- Thread Size (Inch):
- 0.086
- Thread:
- #2-56 UNC
- Overall Insert Length (Decimal Inch):
- 0.129
- Tang:
- Tanged
- Material:
- 304 Stainless Steel (CRES)
- Number of Free Coils:
- 5-1/4
- Length to Diameter Ratio:
- 1.5:1 (1.5D Nominal Length)
- Coating/Finish:
- Dry Film Lubricant
