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KATO-KITS™ THREAD REPAIR KITS...
Screw Thread Inserts for Maintenance, Repair, and Overhaul
 

Thread repair using CoilThread Inserts is a universally accepted method of repairing stripped threads in all types of metals and other materials.  Damaged threads can be brought back to the original thread size, and better than new using stainless steel inserts.  Thread wear, corrosion and galling will be virtually eliminated, and the assembly will be stronger than the original with CoilThread Inserts.

Unlike threaded solid bushing type fasteners, CoilThread Inserts provide space and weight savings to your repair process.  In addition, CoilThread Inserts eliminate the need for oversized drilling and tapping, and welding or plugging of damaged holes.

At KATO there is only one standard of quality for original equipment or repair inserts...All KATO CoilThread Inserts meet or exceed all applicable military, aerospace, and commercial standards. 

Each individual KATO-KIT thread size consists of:

  • Twelve, six, or four KATO Tanged CoilThread Inserts (see chart for details) in the most popular length (1-1/2 Diameter).
  • 1 High-speed steel STI tap.
  • 1 High quality threaded installation tool (mandrel made from steel not plastic)
Nominal
Thread
Size
Complete
KATO-KIT
Part Number
Insert Replacement Pack Inserts
per
Kit
Installation Tool
Part Number
Tap
Part Number
Drill
Size
UNC - UNIFIED COARSE
4-40 CTKK04C CTKP-04C 12 CTKI-04C CTKT-04C #31
5-40 CTKK-05C CTKP-05C 12 CTKI-05C CTKT-05C #29
6-32 CTKK-06C CTKP-06C 12 CTKI-06C CTKT-06C #25
8-32 CTKK-2C CTKP-2C 12 CTKI-2C CTKT-2C 11/64
10-24 CTKK-3C CTKP-3C 12 CTKI-3C CTKT-3C 13/64
12-24 CTKK-1C CTKP-1C 12 CTKI-1C CTKT-1C 15/64
1/4-20 CTKK-4C CTKP-4C 12 CTKI-4C CTKT-4C 17/64
5/16-18 CTKK-5C CTKP-5C 12 CTKI-5C CTKT-5C 21/64
3/8-16 CTKK-6C CTKP-6C 12 CTKI-6C CTKT-6C 25/64
7/16-14 CTKK-7C CTKP-7C 12 CTKI-7C CTKT-7C 29/64
1/2-13 CTKK-8C CTKP-8C 12 CTKI-8C CTKT-8C 17/32
9/16-12 CTKK-9C CTKP-9C 6 CTKI-9C CTKT-9C 19/32
5/8-11 CTKK-10C CTKP-10C 6 CTKI-10C CTKT-10C 21/32
3/4-10 CTKK-12C CTKP-12C 4 CTKI-12C CTKT-12 25/32
7/8-9 CTKK-14C CTKP-14C 4 CTKI-14C CTKT-14 29/32
1-8 CTKK-16C CTKP-16C 4 CTKI-16C CTKT-16C 1-1/32
UNF - UNIFIED FINE
6-40 CTKK-06F CTKP-06F 12 CTKI-06F CTKT-06F #25
8-36 CTKK-2F CTKP-2F 12 CTKI-2F CTKT-2F #17
10-32 CTKK-3F CTKP-3F 12 CTKI-3F CTKT-3F 13/64
1/4-28 CTKK-4F CTKP-4F 12 CTKI-4F CTKT-4F 17/64
5/16-24 CTKK-5F CTKP-5F 12 CTKI-5F CTKT-5F 21/64
3/8-24 CTKK-6F CTKP-6F 12 CTKI-6F CTKT-6F 25/64
7/16-20 CTKK-7F CTKP-7F 12 CTKI-7F CTKT-7F 29/64
1/2-20 CTKK-8F CTKP-8F 12 CTKI-8F CTKT-8F 33/64
9/16-18 CTKK-9F CTKP-9F 6 CTKI-9F CTKT-9F 37/64
5/8-18 CTKK-10F CTKP-10F 6 CTKI-10F CTKT-10F 41/64
3/4-16 CTKK-12F CTKP-12F 4 CTKI-12F CTKT-12F 49/64
7/8-14 CTKK-14F CTKP-14F 4 CTKI-14F CTKT-14F 57/64
1-14 CTKK-16F CTKP-16F 4 CTKI-16F CTKT-16F 1-1/64
1-12 CTKK-161F CTKP-161F 4 CTKI-161F CTKT-161F 1-1/64
METRIC COARSE
M3X0.5 CTKK-M3 CTKP-M3 12 CTKI-M3 CTKT-M3 1/8
M3.5X0.6 CTKK-M3.5 CTKP-M3.5 12 CTKI-M3.5 CTKT-M3.5 #27
M4X0.7 CTKK-M4 CTKP-M4 12 CTKI-M4 CTKT-M4 11/34
M5X0.8 CTKK-M5 CTKP-M5 12 CTKI-M5 CTKT-M5 13/64
M6X1 CTKK-M6 CTKP-M6 12 CTKI-M6 CTKT-M6 1/4
M7X1 CTKK-M7 CTKP-M7 12 CTKI-M7 CTKT-M7 9/32
M8X1.25 CTKK-M8X1.25 CTKP-M8X1.25 12 CTKI-M8X1.25 CTKT-M8X1.25 21/64
M10X1.5 CTKK-M10X1.5 CTKP-M10X1.5 12 CTKI-M10X1.5 CTKT-M10X1.5 13/32
M12X1.75 CTKK-M12X1.75 CTKP-M12X1.75 12 CTKI-M12X1.75 CTKT-M12X1.75 31/64
M14X2 CTKK-M14X2 CTKP-M14X2 12 CTKI-M14X2 CTKT-M14X2 37/64
M16X2 CTKK-M16X2 CTKP-M16X2 6 CTKI-M16X2 CTKT-M16X2 21/32
M18X2.5 CTKK-M18X2.5 CTKP-M18X2.5 6 CTKI-M18X2.5 CTKT-M18X2.5 47/64
M20X2.5 CTKK-M20X2.5 CTKP-M20X2.5 4 CTKI-M20X2.5 CTKT-M20X2.5 13/16
METRIC FINE
M8X1 CTKK-M8X1 CTKP-M8X1 12 CTKI-M8X1 CTKT-M8X1 21/64
M10X1 CTKK-M10X1 CTKP-M10X1 12 CTKI-M10X1 CTKT-M10X1 13/32
M10X1.25 CTKK-M10X1.25 CTKP-M10X1.25 12 CTKI-M10X1.25 CTKT-M10X1.25 13/32
M12X1.25 CTKK-M12X1.25 CTKP-M12X1.25 12 CTKI-M12X1.25 CTKT-M12X1.25 31/64
M12X1.5 CTKK-M12X1.5 CTKP-M12X1.5 12 CTKI-M12X1.5 CTKT-M12X1.5 31/64
M14X1.5 CTKK-M14X1.5 CTKP-M14X1.5 12 CTKI-M14X1.5 CTKT-M14X1.5 9/16
M16X1.5 CTKK-M16X1.5 CTKP-M16X1.5 6 CTKI-M16X1.5 CTKT-M16X1.5 21/32
M18X1.5 CTKK-M18X1.5 CTKP-M18X1.5 6 CTKI-M18X1.5 CTKT-M18X1.5 47/64
 

For sizes above 1 inch or M20 please consult factory.