MS21209C0615L - Screw Threaded Insert by Helicoil Stanley Engineered Fastening

The Heli-Coil MS21209C0615L (Heli-Coil Part Number: 3585-06CN207) is a military-standard screw-locking wire thread insert designed to establish high-strength, permanent internal threads in precision engineering applications.Precision-formed from cold-drawn 304 stainless steel wire with a diamond cross-section, this tanged insert features an internal locking coil with straight, resilient chordal segments. As a mating male bolt enters, these flat segments flex outward, exerting a continuous, predictable prevailing torque that grips the fastener securely. This configuration delivers exceptional vibration resistance, preventing rotational loosening under severe dynamic stress while protecting soft host materials from internal thread stripping, fatigue, and wear. Pre-coated with a specialized dry film lubricant, it stabilizes assembly friction and ensures uniform clamping force.

Internal Screw-Locking Profile Deformed chordal coils apply continuous prevailing locking torque to secure mating hardware tightly against severe operational shock and vibration.

Standard Driving Tang Engineered with an integrated drive tang on the leading coil for positive tool engagement and fast, precise insertion depth setting.

Austenitic Stainless Steel Construction Crafted from work-hardened corrosion-resistant steel to create a wear-proof thread foundation that shields soft alloys from thread fatigue and stripping.

Dry Film Lubricant Coating Pre-treated with a specialized dry film lubricant finish to stabilize installation torque values, optimize clamping force, and eliminate friction-induced galling.

NASM - Products meet Military Specifications (MS) and National Aerospace Standards (NAS) requirements as applicable and are shipped with appropriate documentation.