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KATO Tanged CoilThread Inserts

Kato has been manufacturing conventional tanged CoilThread inserts for over 30 years!  

CoilThread tanged inserts are made of cold-rolled 304 stainless steel wire (AS7245), work-hardened to a tensile strength above 200,000 psi, and a hardness of Rc 43-50.  The finished surface (8-16 micro-inches) is exceedingly smooth, virtually eliminating friction-induced thread erosion.

When assembled with STI-tapped holes, CoilThread inserts form Unified Coarse, or Unified Fine threads that conform to the National Bureau of Standards Handbook H-28, Screw-Thread Standards for Federal Services, Classes 2B and 3B.  Assembled CoilThread inserts will also accommodate UNJ, MIL-S-8879, male threaded fasteners.  Metric CoilThread inserts conform to National Bureau of Standards Handbook H-28/21, M Profile, Tolerance Classes 4H5H or 5H, as well as ISO standards 68, 261, R724 and 965/I.  Assembled metric inserts will also accommodate MJ, AS1370, male threaded fasteners.

The resilient characteristics of each coil in a CoilThread Insert allows it to adjust independently to secure the maximum surface contact with individual threads in the parent material.  As a result, loads are distributed more evenly.  Stress and fatigue concentrations are reduced to maximize thread strength and increase the reliability and life of the fastening system.

The stainless steel used resists corrosion under normal environmental conditions.  Galvanic action within the thread assembly is reduced, further adding to the life of the fastening assembly.  Kato Inserts are used with temperatures from -320°F to +800°F (-195.6°C to +426.7°C).

CoilThread Inserts provide design and manufacturing flexibility.  Design opportunities are afforded by the structure of these inserts.  Because of the continuous helically-coiled design, they need no thick wall structure to support the internal and external threads; the diamond-shaped coil is the thread!

The inserts can be installed in reduced-sized bosses or flanges and within constricted areas, thus saving space and weight while providing high strength.  A boss radius equal to the nominal bolt diameter is usually sufficient.

Kato CoilThread Inserts are precision-engineered and have been put through rigorous torque, tension, and vibration tests as well as comprehensive dimensional inspections and metallurgical analysis in attaining their MIL-Spec qualifications.  CoilThread Inserts have been thoroughly tested by an independent testing laboratory and are certified to conform to NASM8846.  A copy of this report available upon request from the Kato Tech-Group.

In addition, CoilThread Inserts and Tools are in conformance with the standards listed on the Military, Aerospace & Commercial Standards Page.

Precision engineering, exacting manufacturing standards, and stringent quality control procedures assure a high quality product that meets or exceeds all applicable military and aerospace standards

• Lower Pricing than competitive inserts!
• Meet or exceed all applicable military, aerospace and commercial standards.  Full Traceability!
• Complete range of locking and free-running sizes, bulk or strip, unified or metric.
• CoilThread Inserts are available in Bulk and on Strip Feed Reels...
  Providing flexibility for any production set-up.
• Design and Application Assistance:  Over 25 years of manufacturing and engineering experience.
• Full line of taps, gages, hand tools, air tools, and electric tools available...100% interchangeable and will install HeliCoil, Microdot, Recoil and all other major brands of inserts.
• The Kato Guarantee:  Try Kato CoilThread Inserts...You have nothing to lose!.

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