Heli-Coil is the leading brand in the industry, originating from the United States, with an absolute commitment to reliable quality. It is the only thread insert brand recognized by NASA and holds a prestigious position in aerospace, military, automotive, electronics, communications, medical, and other fields.
The Heli-Coil range of steel thread inserts includes various configurations, whether it's plating, materials, locking, or non-locking variants, making it completely adaptable and configurable for industries such as automotive, industrial, aerospace, and defense. The industry trend toward lightweight materials also demands structural integrity for bolts or fastening joints, a need that Heli-Coil's design inherently fulfills as an ideal solution for these components.
Brand Overview
Heli-Coil, under the Emhart brand, specializes in steel wire thread inserts. Emhart Fastening Systems, a subsidiary of the Fortune 500 company Stanley Black & Decker, is a leading entity in the industry. The Heli-Coil brand's thread inserts are the top choice in the industry, with 80% of their application currently in military and aerospace domains. Additionally, Emhart possesses globally renowned brands like POP, Heli-Coil, NPR, and TUCKER.
Brand Features
Thread inserts, also known as steel wire thread inserts or coil inserts, are high-precision concentric bodies of internal and external threads, with surface precision reaching 8 to 16 micro inches (approximately 0.2 to 0.4µm). Once installed, they form high-precision internal threads compliant with respective standards, surpassing the performance of internally threaded holes formed directly with taps.
Conventional bolted connections have only a few threads in contact, leaving the rest in a stressed state, leading to uneven force distribution. They tend to loosen under vibration, temperature variations, posing serious risks to equipment safety and stability. Heli-Coil completely eliminates this possibility.
Lightweight metals like aluminum, magnesium, etc., are widely used, but their threaded strength often falls short, leading to thread connection issues under varying conditions. Threads tend to oxidize, rust over time, significantly reducing joint strength and reliability.
Threads that undergo frequent disassembly and assembly, such as in molds, mechanical equipment, are prone to stripping. However, thread inserts offer elasticity, ensuring a tighter fit between bolts and threads, distributing force evenly for a more secure connection. Made from corrosion-resistant high-strength materials like 304 stainless steel, these inserts resist wear and rust, maintaining the integrity of new internal threads.
Steel Wire Thread Insert Features
Heli-Coil steel wire inserts are categorized by:
Size: Metric and Imperial measurements.
Material: 304 Stainless Steel (US-produced stainless steel), Inconel X750 alloy, phosphor bronze alloy, titanium alloy, Nitronic60TM.
Function: Standard type and bolt-locking type.
Coating: Uncoated, dry lubricant coating (molybdenum disulfide), cadmium plating, Primer FreeTM, silver plating.
Thread Insert Specifications
Heli-Coil thread insert specifications include:
Thread specifications: Metric (coarse and fine threads), Unified Coarse (UNC), Unified Fine (UNF), as well as British Standard (BSW, BSF) and pipe thread (G) specifications.
Length specifications: The length of inserts is typically selected as a multiple of the nominal diameter 'd' of the bolt being installed within it. Options include lengths of 1d, 1.5d, 2d, 2.5d, and 3d for each type of thread insert.