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  HeliCoil Inserts, Kato Inserts, ReCoil Inserts  
      Free Running (UNC)  
      Free Running (UNF)  
      Screw-Locking (UNC)  
      Screw-Locking (UNF)  
       Metric Inserts  
       Tangless Inserts  
       Thread Repair Kits  
      

 

 

 

 

 

Metric Coarse Kato Inserts Free Running
Metric Fine Kato Inserts Free Running
Metric Coarse Kato Inserts Screw Lock
Metric Fine Kato Inserts Screw Lock

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).
 

 Get product specs - click here:

TANGLESS® is a registered trademark of Advanex Inc.
HeliCoil® is a registered trademark of Emhart Teknologies, LLC.
Recoil® is a registered trademark of Alcoa.

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 Inserts, Microdot, Recoil and all other major brands of inserts.
The Kato Guarantee: Try Kato CoilThread Inserts...You have nothing to lose!.

Metric Coarse Insert - Free Running
Ordering Information

HeliCoil Inserts Cross Ref Military Thread Length Alu. Drill Steel Drill Drill Depth A Drill Depth B Csk. Min D Csk. Max D Thread Depth C Outside Dia. Min Outside Dia. Max
1084-2.2CN022 MA3279-100 M2.2x0.45 2.2 #42 #42 6 4 2.4 2.9 2.7 2.8 3
1084-2.2CN033 MA3279-150 M2.2x0.45 3.3 #42 #42 7.1 5.1 2.4 2.9 3.8 2.8 3
1084-2.2CN044 MA3279-200 M2.2x0.45 4.4 #42 #42 8.2 6.2 2.4 2.9 4.9 2.8 3
1084-2.5CN025 MA3279-101 M2.5x0.45 2.5 #37 #37 6.45 4.3 2.9 3.4 3 3.2 3.7
1084-2.5CN038 MA3279-151 M2.5x0.45 3.8 #37 #37 7.7 5.6 2.9 3.4 4.2 3.2 3.7
1084-2.5CN050 MA3279-201 M2.5x0.45 5 #37 #37 10.5 6.8 2.9 3.4 5.5 3.2 3.7
1084-3CN030 MA3279-102 M3x0.5 3 1/8 1/8 7.5 5 3.4 4 3.5 3.8 4.35
1084-3CN045 MA3279-152 M3x0.5 4.5 1/8 1/8 9 6.5 3.4 4 5 3.8 4.35
1084-3CN060 MA3279-202 M3x0.5 6 1/8 1/8 10.5 8 3.4 4 6.5 3.8 4.35
1084-3.5CN035 MA3279-103 M3.5x0.6 3.5 #27 #26 8.85 5.9 4.1 4.7 4.1 4.4 4.95
1084-3.5CN053 MA3279-153 M3.5x0.6 5.3 #27 #26 10.6 7.7 4.1 4.7 5.9 4.4 4.95
1084-3.5CN070 MA3279-203 M3.5x0.6 7 #27 #26 12.35 9.4 4.1 4.7 7.6 4.4 4.95
1084-4CN040 MA3279-104 M4x0.7 4 #19 #19 10.2 6.8 4.7 5.3 4.7 5.05 5.6
1084-4CN060 MA3279-154 M4x0.7 6 #19 #19 12.2 8.8 4.7 5.3 6.7 5.05 5.6
1084-4CN080 MA3279-204 M4x0.7 8 #19 #19 14.2 10.8 4.7 5.3 8.7 5.05 5.6
1084-5CN050 MA3279-105 M5x0.8 5 #5 #4 12.3 8.2 5.8 6.4 5.8 6.25 6.8
1084-5CN075 MA3279-155 M5x0.8 7.5 #5 #4 14.8 10.7 5.8 6.4 8.3 6.25 6.8
1084-5CN100 MA3279-205 M5x0.8 10 #5 #4 17.3 13.2 5.8 6.4 10.8 6.25 6.8
1084-6CN060 MA3279-106 M6x1 6 D 1/4 15 10 7.1 7.7 7 7.4 7.95
1084-6CN090 MA3279-156 M6x1 9 D 1/4 18 13 7.1 7.7 10 7.4 7.95
1084-6CN120 MA3279-206 M6x1 12 D 1/4 21 16 7.1 7.7 13 7.4 7.95
1084-7CN070 MA3279-107 M7x1 7 L L 16.5 11 8.1 8.7 8 8.65 9.2
1084-7CN105 MA3279-157 M7x1 10.5 L L 20 14.5 8.1 8.7 11.5 8.65 9.2
1084-7CN140 MA3279-207 M7x1 14 L L 23.5 18 8.1 8.7 15 8.65 9.2
1084-8CN080 MA3279-109 M8x1.25 8 21/64 Q 19.5 13 9.5 10.1 9.3 9.8 10.35
1084-8CN120 MA3279-159 M8x1.25 12 21/64 Q 23.5 17 9.5 10.1 13.3 9.8 10.35
1084-8CN160 MA3279-209 M8x1.25 16 21/64 Q 27.5 21 9.5 10.1 17.3 9.8 10.35
1084-10CN100 MA3279-111 M10x1.5 10 Z Z 19 16 11.8 12.4 11.5 11.95 12.5
1084-10CN150 MA3279-161 M10x1.5 15 Z Z 24 21 11.8 12.4 16.5 11.95 12.5
1084-10CN200 MA3279-211 M10x1.5 20 Z Z 29 26 11.8 12.4 21.5 11.95 12.5
1084-12CN120 MA3279-114 M12x1.75 12 31/64 1/2 22.5 19 14.2 14.8 13.8 14.3 15
1084-12CN180 MA3279-164 M12x1.75 18 31/64 1/2 28.5 25 14.2 14.8 19.8 14.3 15
1084-12CN240 MA3279-214 M12x1.75 24 31/64 1/2 34.5 31 14.2 14.8 25.8 14.3 15
1084-14CN140 MA3279-116 M14x2 14 37/64 37/64 26 22 16.5 17.1 16 16.65 17.35
1084-14CN210 MA3279-166 M14x2 21 37/64 37/64 33 29 16.5 17.1 23 16.65 17.35
1084-14CN280 MA3279-216 M14x2 28 37/64 37/64 40 36 16.5 17.1 30 16.65 17.35
1084-16CN160 MA3279-118 M16x2 16 21/32 21/32 28 24 18.5 19.1 18 18.9 19.6
1084-16CN240 MA3279-168 M16x2 24 21/32 21/32 36 32 18.5 19.1 26 18.9 19.6
1084-16CN320 MA3279-218 M16x2 32 21/32 21/32 44 40 18.5 19.1 34 18.9 19.6
1084-18CN180 MA3279-121 M18x2.5 18 47/64 47/64 33 28 21.2 21.8 20.5 21.3 22
1084-18CN270 MA3279-171 M18x2.5 27 47/64 47/64 42 37 21.2 21.8 29.5 21.3 22
1084-18CN360 MA3279-221 M18x2.5 36 47/64 47/64 51 46 21.2 21.8 38.5 21.3 22
1084-20CN200 MA3279-124 M20x2.5 20 13/16 13/16 35 30 23.2 23.8 22.5 23.55 24.4
1084-20CN300 MA3279-174 M20x2.5 30 13/16 13/16 45 40 23.2 23.8 32.5 23.55 24.4
1084-20CN400 MA3279-224 M20x2.5 40 13/16 13/16 55 50 23.2 23.8 42.5 23.55 24.4

 

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Metric Fine Inserts - Free Running
Ordering Information

HeliCoil Inserts Cross Ref Military Thread Length Alu. Drill Steel Drill Drill Depth A Drill Depth B Csk. Min D Csk. Max D Thread Depth C Outside Dia. Min Outside Dia. Max
4255-8CN080 MA3279-108 M8x1 8 21/64 21/64 18 12 9.1 9.7 9 9.7 10.25
4255-8CN120 MA3279-158 M8x1 12 21/64 21/64 22 16 9.1 9.7 13 9.7 10.25
4255-8CN160 MA3279-208 M8x1 16 21/64 21/64 26 20 9.1 9.7 17 9.7 10.25
4255-10CN100   M10x1 10 Y 13/32 16 14 11.1 11.7 11 11.95 12.5
4255-10CN150   M10x1 15 Y 13/32 21 19 11.1 11.7 16 11.95 12.5
4255-10CN200   M10x1 20 Y 13/32 26 24 11.1 11.7 21 11.95 12.5
4649-10CN100 MA3279-110 M10x1.25 10 Y 13/32 17.5 15 11.5 12.1 11.3 12.1 12.65
4649-10CN150 MA3279-160 M10x1.25 15 Y 13/32 22.5 20 11.5 12.1 16.3 12.1 12.65
4649-10CN200 MA3279-210 M10x1.25 20 Y 13/32 27.5 25 11.5 12.1 21.3 12.1 12.65
4649-12CN120 MA3279-112 M12x1.25 12 31/64 31/64 19.5 17 13.5 14.1 13.3 14.3 15
4649-12CN180 MA3279-162 M12x1.25 18 31/64 31/64 25.5 23 13.5 14.1 19.3 14.3 15
4649-12CN240 MA3279-212 M12x1.25 24 31/64 31/64 31.5 29 13.5 14.1 25.3 14.3 15
3745-12CN120 MA3279-113 M12x1.5 12 31/64 1/2 21 18 13.8 14.4 13.5 14.25 14.95
3745-12CN180 MA3279-163 M12x1.5 18 31/64 1/2 27 24 13.8 14.4 19.5 14.25 14.95
3745-12CN240 MA3279-213 M12x1.5 24 31/64 1/2 33 30 13.8 14.4 25.5 14.25 14.95
3745-14CN140 MA3279-115 M14x1.5 14 9/16 37/64 23 20 15.8 16.4 15.5 16.55 17.25
3745-14CN210 MA3279-165 M14x1.5 21 9/16 37/64 30 27 15.8 16.4 22.5 16.55 17.25
3745-14CN280 MA3279-215 M14x1.5 28 9/16 37/64 37 34 15.8 16.4 29.5 16.55 17.25
3745-16CN160 MA3279-117 M16x1.5 16 41/64 21/32 25 22 17.8 18.4 17.5 18.9 19.6
3745-16CN240 MA3279-167 M16x1.5 24 41/64 21/32 33 30 17.8 18.4 25.5 18.9 19.6
3745-16CN320 MA3279-217 M16x1.5 32 41/64 21/32 41 38 17.8 18.4 33.5 18.9 19.6
3745-18CN180 MA3279-119 M18x1.5 18 23/32 47/64 27 24 19.8 20.4 19.5 21.05 21.75
3745-18CN270 MA3279-169 M18x1.5 27 23/32 47/64 36 33 19.8 20.4 28.5 21.05 21.75
3745-18CN360 MA3279-219 M18x1.5 36 23/32 47/64 45 42 19.8 20.4 37.5 21.05 21.75

 Get product specs - click here:

Metric Coarse Insert - Screw Lock
Ordering Information

HeliCoil Inserts Cross Ref Military Thread Length Alu. Drill Steel Drill Drill Depth A Drill Depth B Csk. Min D Csk. Max D Thread Depth C Outside Dia. Min Outside Dia. Max
4184-2.2CN022 MA3329-100 M2.2x0.45 2.2 #42 #42 6 4 2.4 2.9 2.7 2.8 3
4184-2.2CN033 MA3329-150 M2.2x0.45 3.3 #42 #42 7.1 5.1 2.4 2.9 3.8 2.8 3
4184-2.2CN044 MA3329-200 M2.2x0.45 4.4 #42 #42 8.2 6.2 2.4 2.9 4.9 2.8 3
4184-2.5CN025 MA3329-101 M2.5x0.45 2.5 #37 #37 6.45 4.3 2.9 3.4 3 3.2 3.7
4184-2.5CN038 MA3329-151 M2.5x0.45 3.8 #37 #37 7.7 5.6 2.9 3.4 4.2 3.2 3.7
4184-2.5CN050 MA3329-201 M2.5x0.45 5 #37 #37 10.5 6.8 2.9 3.4 5.5 3.2 3.7
4184-3.5CN035 MA3329-103 M3.5x0.6 3.5 #27 #26 8.85 5.9 4.1 4.7 4.1 4.4 4.95
4184-3.5CN053 MA3329-153 M3.5x0.6 5.3 #27 #26 10.6 7.7 4.1 4.7 5.9 4.4 4.95
4184-3.5CN070 MA3329-203 M3.5x0.6 7 #27 #26 12.35 9.4 4.1 4.7 7.6 4.4 4.95
4184-3CN030 MA3329-102 M3x0.5 3 1/8 1/8 7.5 5 3.4 4 3.5 3.8 4.35
4184-3CN045 MA3329-152 M3x0.5 4.5 1/8 1/8 9 6.5 3.4 4 5 3.8 4.35
4184-3CN060 MA3329-202 M3x0.5 6 1/8 1/8 10.5 6.8 3.4 4 6.5 3.8 4.35
4184-4CN040 MA3329-104 M4x0.7 4 #19 #19 10.2 6.8 4.7 5.3 4.7 5.05 5.6
4184-4CN060 MA3329-154 M4x0.7 6 #19 #19 12.2 8.8 4.7 5.3 6.7 5.05 5.6
4184-4CN080 MA3329-204 M4x0.7 8 #19 #19 14.2 10.8 4.7 5.3 8.7 5.05 5.6
4184-5CN050 MA3329-105 M5x0.8 5 #5 #4 12.3 8.2 5.8 6.4 5.8 6.25 6.8
4184-5CN075 MA3329-155 M5x0.8 7.5 #5 #4 14.8 10.7 5.8 6.4 8.3 6.25 6.8
4184-5CN100 MA3329-205 M5x0.8 10 #5 #4 17.3 13.2 5.8 6.4 10.8 6.25 6.8
4184-6CN060 MA3329-106 M6x1 6 D 1/4 15 10 7.1 7.7 7 7.4 7.95
4184-6CN090 MA3329-156 M6x1 9 D 1/4 18 13 7.1 7.7 10 7.4 7.95
4184-6CN120 MA3329-206 M6x1 12 D 1/4 21 16 7.1 7.7 13 7.4 7.95
4184-7CN070 MA3329-107 M7x1 7 L L 16.5 11 8.1 8.7 8 8.65 9.2
4184-7CN105 MA3329-157 M7x1 10.5 L L 20 14.5 8.1 8.7 11.5 8.65 9.2
4184-7CN140 MA3329-207 M7x1 14 L L 23.5 18 8.1 8.7 15 8.65 9.2
4184-8CN080 MA3329-109 M8x1.25 8 21/64 Q 19.5 13 9.5 10.1 9.3 9.8 10.35
4184-8CN120 MA3329-159 M8x1.25 12 21/64 Q 23.5 18 9.5 10.1 13.3 9.8 10.35
4184-8CN160 MA3329-209 M8x1.25 16 21/64 Q 27.5 21 9.5 10.1 17.3 9.8 10.35
4184-10CN100 MA3329-111 M10x1.5 10 Z Z 19 16 11.8 12.4 11.5 11.95 12.5
4184-10CN150 MA3329-161 M10x1.5 15 Z Z 24 21 11.8 12.4 16.5 11.95 12.5
4184-10CN200 MA3329-211 M10x1.5 20 Z Z 29 26 11.8 12.4 21.5 11.95 12.5
4184-12CN120 MA3329-114 M12x1.75 12 31/64 1/2 22.5 19 14.2 14.8 13.8 14.3 15
4184-12CN180 MA3329-164 M12x1.75 18 31/64 1/2 28.5 25 14.2 14.8 19.8 14.3 15
4184-12CN240 MA3329-214 M12x1.75 24 31/64 1/2 34.5 31 14.2 14.8 25.8 14.3 15
4184-14CN140 MA3329-116 M14x2 14 37/64 37/64 26 22 16.5 17.1 16 16.65 17.35
4184-14CN210 MA3329-166 M14x2 21 37/64 37/64 33 29 1yy6.5 17.1 23 16.65 17.35
4184-14CN280 MA3329-216 M14x2 28 37/64 37/64 40 36 16.5 17.1 30 16.65 17.35
4184-16CN160 MA3329-118 M16x2 16 21/32 21/32 28 24 18.5 19.1 18 18.9 19.6
4184-16CN240 MA3329-168 M16x2 24 21/32 21/32 36 32 18.5 19.1 26 18.9 19.6
4184-16CN320 MA3329-218 M16x2 32 21/32 21/32 44 40 18.5 19.1 34 18.9 19.6
4184-18CN180 MA3329-121 M18x2.5 18 47/64 47/64 33 28 21.2 21.8 20.5 21.3 22
4184-18CN270 MA3329-171 M18x2.5 27 47/64 47/64 42 37 21.2 21.8 29.5 21.3 22
4184-18CN360 MA3329-221 M18x2.5 36 47/64 47/64 51 46 21.2 21.8 38.5 21.3 22
4184-20CN200 MA3329-124 M20x2.5 20 13/16 13/16 35 30 23.2 23.8 22.5 23.55 24.4
4184-20CN300 MA3329-174 M20x2.5 30 13/16 13/16 45 40 23.2 23.8 32.5 23.55 24.4
4184-20CN400 MA3329-224 M20x2.5 40 13/16 13/16 55 50 23.2 23.8 42.5 23.55 24.4

 Get product specs - click here:

Metric Fine Inserts - Screw-Lock
Ordering Information

HeliCoil Inserts Cross Ref Military Thread Length Alu. Drill Steel Drill Drill Depth A Drill Depth B Csk. Min D Csk. Max D Thread Depth C Outside Dia. Min Outside Dia. Max
5255-8CN080 MA3329-108 M8x1 8 21/64 21/64 18 12 9.1 9.7 9 9.7 10.25
5255-8CN120 MA3329-158 M8x1 12 21/64 21/64 22 16 9.1 9.7 13 9.7 10.25
5255-8CN160 MA3329-208 M8x1 16 21/64 21/64 26 20 9.1 9.7 17 9.7 10.25
5255-10CN100   M10x1 10 Y 13/32 16 22 11.1 11.7 11 11.95 12.5
5255-10CN150   M10x1 15 Y 13/32 21 19 11.1 11.7 16 11.95 12.5
5255-10CN200   M10x1 20 Y 13/32 26 20 11.1 11.7 21 11.95 12.5
5649-10CN100 MA3329-110 M10x1.25 10 Y 13/32 17.5 15 11.5 12.1 11.3 12.1 12.65
5649-10CN150 MA3329-160 M10x1.25 15 Y 13/32 22.5 20 11.5 12.1 16.3 12.1 12.65
5649-10CN200 MA3329-210 M10x1.25 20 Y 13/32 27.5 25 11.5 12.1 21.3 12.1 12.65
5649-12CN120 MA3329-112 M12x1.25 12 31/64 31/64 19.5 17 13.5 14.1 13.3 14.3 15
5649-12CN180 MA3329-162 M12x1.25 18 31/64 31/64 25.5 23 13.5 14.1 19.3 14.3 15
5649-12CN240 MA3329-212 M12x1.25 24 31/64 31/64 31.5 29 13.5 14.1 25.3 14.3 15
5145-12CN120 MA3329-113 M12x1.5 12 31/64 1/2 21 18 13.8 14.4 13.5 14.25 14.95
5145-12CN180 MA3329-163 M12x1.5 18 31/64 1/2 27 24 13.8 14.4 19.5 14.25 14.95
5145-12CN240 MA3329-213 M12x1.5 24 31/64 1/2 33 30 13.8 14.4 25.5 14.25 14.95
5145-14CN140 MA3329-115 M14x1.5 14 9/16 37/64 23 20 15.8 16.4 15.5 16.55 17.25
5145-14CN210 MA3329-165 M14x1.5 21 9/16 37/64 30 27 15.8 16.4 22.5 16.55 17.25
5145-14CN280 MA3329-215 M14x1.5 28 9/16 37/64 37 34 15.8 16.4 29.5 16.55 17.25
5145-16CN160 MA3329-117 M16x1.5 16 41/64 21/32 25 22 17.8 18.4 17.5 18.9 19.6
5145-16CN240 MA3329-167 M16x1.5 24 41/64 21/32 33 30 17.8 18.4 25.5 18.9 19.6
5145-16CN320 MA3329-217 M16x1.5 32 41/64 21/32 41 38 17.8 18.4 33.5 18.9 19.6
5145-18CN180 MA3329-119 M18x1.5 18 23/32 47/64 27 24 19.8 20.4 19.5 21.05 21.75
5145-18CN270 MA3329-169 M18x1.5 27 23/32 47/64 36 33 19.8 20.4 28.5 21.05 21.75
5145-18CN360 MA3329-219 M18x1.5 36 23/32 47/64 45 42 19.8 20.4 37.5 21.05 21.75

 Get product specs - click here:

TANGLESS® is a registered trademark of Advanex Inc.
HeliCoil® is a registered trademark of Emhart Teknologies, LLC.
POP Rivet® is a registered trademark of Emhart Teknologies, LLC.
Recoil® is a registered trademark of Alcoa.