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INSERT 3/4-12 - Heli Coil Products

Part #: HEK364-12-1

The Heli-Coil INSERT 3/4-12 (Model HEK364-12-1) from Heli-Coil Products is a professional-grade solution engineered for superior thread repair and reinforcement in demanding automotive and industrial applications. This precision-formed helical insert effectively restores stripped, damaged, or worn threads to their original size and strength, providing a permanent and reliable fastening point. It is an essential component for any technician or mechanic seeking to maintain the integrity and longevity of threaded connections in various materials.

Key Features

  • Permanent Thread Repair: Creates strong, permanent internal 3/4-12 threads that often exceed the strength of the original parent material.
  • Durable Construction: Typically manufactured from robust 304 Stainless Steel, offering excellent corrosion resistance and high strength for long-lasting performance.
  • Enhanced Thread Integrity: Ideal for strengthening threads in softer materials such as aluminum, magnesium, and cast iron, preventing premature wear and stripping.
  • Even Load Distribution: The unique helical design distributes fastener loads uniformly over a larger area, reducing stress concentration and resistance to galling.
  • Vibration and Impact Resistant: Maintains secure fastening even under dynamic loads and frequent assembly/disassembly cycles.
  • Cost-Effective Solution: Provides a reliable alternative to costly component replacement, extending the service life of valuable parts.

Applications

The Heli-Coil INSERT 3/4-12 is versatile for a wide range of professional applications where strong, reliable threads are critical:

  • Automotive Repair: Commonly used in engine blocks, transmission housings, spark plug ports, oil drain plugs, brake systems, and accessory mounting points.
  • Industrial Maintenance: Essential for repairing and reinforcing threads in heavy machinery, manufacturing equipment, jigs, fixtures, and structural components.
  • General Engineering: Suitable for use in various materials including lightweight metal alloys, plastics, and composite materials, ensuring dependable threaded connections.

Specifications

  • Manufacturer: Heli-Coil Products
  • Model Number: HEK364-12-1
  • Product Name: INSERT 3/4-12
  • Thread Size: 3/4-12 (Unified Coarse Thread, 3/4 inch nominal diameter, 12 threads per inch)
Only 1 left in stock - order soon

$3.70

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This product was added to our catalog on Tuesday 30 June, 2026.

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