KATO FASTENING SYSTEMS, INC.		  

 

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  KATO Products
 
   
 
New Filter-Regulator-Lubricator for Kato Air Tools!

The filter cleans and removes moisture from the air, the regulator controls the air pressure, and the lubricator provides a steady source of oil to the air motor. Learn more about the Kato Filter-Regulator-Lubricator in the Tangless and Tanged air tool pages.
 

 
   
   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

KATO Tangless CoilThread Inserts

KATO has been manufacturing Tangless CoilThread inserts for over 15 years!  

Tangless CoilThread 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, Tangless 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 Tangless CoilThread inserts will also accommodate UNJ, MIL-S-8879, male threaded fasteners.  Metric Tangless 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 Tangless CoilThread inserts will also accommodate MJ, AS1370, male threaded fasteners.
   
 
   
 
   
 
   
  KATO Tangless inserts give you all the benefits, features and performance of conventional tanged inserts.  In fact, KATO Tangless inserts are identical in form fit and function to conventional tanged inserts.  The only thing missing from KATO Tangless inserts are the tangs!

Here is where Tangless CoilThread Inserts stand out from all other helically-coiled inserts.  Instead of a tang, tangless inserts feature a unique, ramped driving notch on the inside diameter of the first coil on each end of the insert (see diagram below). To drive the insert we developed an innovative installation tool with a patented, internal, spring -loaded pawl located at the tip of the tools mandrel.  During Installation, this hooked pawl locks into the Insert Driving Notch and rotates the insert into the tapped hole.  The pawl then retracts into the mandrel to allow the tool to back out of the installed insert.

  End View 
During Insert Installation
 		 End View 
Tool Leaving Installed Insert
 
 

 

The spring-loaded pawl within the installation tool engages the driving notch to install the insert.  The chamfered ends of the insert allow the insert to smoothly enter the tapped hole.

Once the insert is driven to the proper depth, the installation tool automatically reverses rotation. The pawl slides back into the tool's recess as the mandrel unscrews from the installed insert.
   
 
   
 

Troublesome Tangs:  You Can't Lose What you Don't Have!

Conventional helically-coiled inserts need tangs for installation.  But once installed, loose tangs become potentially hazardous.  They require special tools, time consuming breaking off and removal, and careful watch.  Even with care, tangs unavoidably disappear into expensive equipment, often showing up later causing considerable damage to electrical and mechanical components.  In some application, every tiny, loose tang has to be carefully accounted for.  But you can't lose what you don't have, so we eliminated the tangs altogether.  With KATO Tangless® Inserts you'll never have to remove or look for another lost tang.  And every minute you're not looking for tangs is time towards increased productivity and increased profits

     
This The Possibility of loose tangs short-circuiting valuable electronics.  Tangless® CoilThread Inserts are FOD-free (no foreign object damage)!
   
And This The need to break-off and remove tangs after insert installation.  A Process that cost up to 50˘ per hole!
   
And This The need to count for all loose tangs during assembly.  You can't lose what you don't have!
   
And This The damage to expensive castings caused by outmoded insert removal techniques.  Tangless® insert removal tool never touches the casting.
   
 
 

"I highly recommend the addition of the tangless versions as interchangeable parts to the existing specifications for helically wound inserts." 
---Lockheed Sanders
  		   
"...increases the flexibility of OEM's and repair depots, but does not mandate any changes to system designs, repair manuals or operations."
---Texas Instruments
 		    
"Tangless Inserts are an improvement over conventional Tanged Inserts.  They speed up installation time and eliminate damage to our parts."
---Martin Marietta
 		    
"We support the proposal to add Tangless Inserts to the applicable Military Standards covering tanged inserts."
---ITT Defense & Electronics
 		    
"...cost effective and a quality enhancement...provide a higher quality product (no loose tangs inside electronic hardware) and a competitive price."
---Raytheon
 		    

It's safe to say these companies know about efficient production methods,
and they use KATO Tangless CoilThread Inserts!
   
 
   

  • FOD-Free Design:  No tangs to break off, retrieve...or lose!
  • Approved for use on military programs by NASM8846 (previously MIL-I-8846) and NAS1130!
  • Cost Reduction:  Significantly decreased installation and inspection time!
  • Bi-Directional design eliminates insert orientation requirement!
  • Quick, non-destructive removal prevents damage to castings!

 
   

Continue to KATO Tangless Insert Part Numbers