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Helicoil Thread Repair Kits & Master Sets

Helicoil inserts are available in thread repair kits and sets for repairing tapped holes which have been stripped or damaged due to wear, corrosion and overtorque.
They are available in inch, metric, spark plug and pipe thread series. All kits have a quantity of inserts, the proper size drill, high speed steel Helicoil tap and an installation tool.
The Professional Kits* (shown in bold type) also includes a tang removal tool and quantities of three lengths of inserts.

HELICOIL MASTER THREAD REPAIR SETS

TypePart No.Insert sizes included in set
Inch Coarse4934 1/4-205/16-18, 3/8-16, 7/16-14, 1/2-13, 5/8-11
Inch Fine4936 10-321/4-28, 5/16-24, 3/8-24, 7/16-20, 1/2-20
Metric4937-125 M5x0.8M6x1, M8x1.25, M10x1.25
Metric4937-150 M5x0.8M6x1, M8x1.25, M10x1.5

All sets contain a drill, tap, tool and inserts for each size listed above.
See Helicoil Bulletin 998 for a complete listing of all Helicoil thread repair products.

 

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Thread Size Kit P/N Inserts Per Kit Price  
Unified Coarse
4-40 5401-04 36* $242.14
5-40 5401-05 36* $460.19
6-32 5401-06 36* $182.63
8-32 5401-2 36* $164.92
10-24 5401-3 36* $167.78
12-24 5401-1 36* $172.10
1/4-20 5401-4 36* $164.92
5/16-18 5401-5 36* $164.92
3/8-16 5401-6 18* $203.15
7/16-14 5401-7 18* $194.18
1/2-13 5401-8 18* $231.12
9/16-12 5401-9 6 $342.41
5/8-11 5401-10 6 $457.87
3/4-10 5401-12 4 $588.44
7/8-9 5521-14 6 $749.74
1-8 5521-16 6 $929.56
1–1/8-7 5521-18 5 $1,332.50
1–1/4-7 5521-20 4 $1,490.29
1–3/8-6 5521-22 4 $1,902.96
1–1/2-6 5521-24 4 $1,921.70
Unified Fine
6-40 5402-06 36* $460.19
8-36 5402-2 36* $460.19
10-32 5402-3 36* $160.33
1/4-28 5402-4 36* $160.33
5/16-24 5402-5 36* $160.33
3/8-24 5402-6 18* $198.56
7/17-20 5402-7 18* $214.43
1/2-20 5402-8 18* $210.60
9/16-18 5402-9 6 $320.38
5/8-18 5402-10 6 $440.91
3/4-16 5402-12 4 $517.64
7/8-14 5528-14 6 $1,155.82
1-14 5528-16 6 $1,563.35
1-12 5528-161 6 $1,575.45
1–1/8-12 5528-18 5 $1,664.71
1–1/4-12 5528-20 4 $2,080.24
1–3/8-12 5528-22 4 $2,437.51
1–1/2-12 5528-24 4 $2,758.43
Metric Coarse
M3x0.5 5403-3 36* $460.19
M3.5x0.6 5403-3.5 36* $460.19
M4x0.7 5403-4 18* $160.33
M5x0.8 5403-5 18* $160.33
M6x1 5403-6 18* $160.33
M7x1 5403-7 18* $217.51
M8x1.25 5403-8 18* $160.33
M9x1.25 5403-9 12 $199.37
M10x1.5 5403-10 18* $203.15
M11x1.5 5403-11 6 $237.44
M12x1.75 5403-12 18* $232.42
M14x2 5403-14 12 $369.90
M16x2 5403-16 6 $371.68
M18x2.5 5403-18 6 $484.00
M20x2.5 5403-20 4 $743.36
Metric Fine
M8x1 5404-8 18* $217.51
M10x1 5404-10 18* $270.38
M10x1.25 5405-10 18* $232.90
M12x1.25 5405-12 18* $278.80
M12x1.5 5406-12 18* $266.00
M14x1.5 5406-14 6 $372.98
M16x1.5 5406-16 6 $591.52
M18x1.5 5406-18 6 $782.57

* The total quantity of inserts in the Professional Kits represents 3 lengths.