Helicoil Thread

Helicoil Thread
in metric? 1.25 treads per mm! how many to the inch?

I have a spark plug cross threaded. I know the plug has 1.25 treads per mm, must convert to inches to get a drill bit, tap.and helicoil to ream this puppy a new hole!!!

Actually there are 25.4 mm in 1 inch (there are 2.54 cm per inch)

The calculation is straight forward, but not sure if this is what you want:
1.25 threads/mm * 25.4mm/inch = 31.75 threads/inch
Or 31.75 threads per inch

Thread Repair Using A HeliCoil Insert

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M9 X 1.25 Perma-Coil Thread Repair Kit! Uses Helicoil


M9 X 1.25 Perma-Coil Thread Repair Kit! Uses Helicoil


$29.99


Helicoil 5/16-18  Thread Repair Kit


Helicoil 5/16-18 Thread Repair Kit


$25.99


50 NEW 10 - 32 X .285


50 NEW 10 – 32 X .285″ Helicoil Thread Inserts


$15.99


M12 X 1.50 Perma-Coil Thread Repair Kit Uses Helicoil


M12 X 1.50 Perma-Coil Thread Repair Kit Uses Helicoil


$43.99


Helicoil M14X1.25 Sav-A-Thread Kit Spark Plug  5334-14


Helicoil M14X1.25 Sav-A-Thread Kit Spark Plug 5334-14


$23.99


Helicoil 7/16-14 Thread Repair Kit   (my ID-T)


Helicoil 7/16-14 Thread Repair Kit (my ID-T)


$20.00


1/2-13 OEM Recoil Fix-A-Thred Uses Helicoil! Thread Kit


1/2-13 OEM Recoil Fix-A-Thred Uses Helicoil! Thread Kit


$9.99


20 NEW M8 X 1.25 X 24.0mm Helicoil Thread Inserts


20 NEW M8 X 1.25 X 24.0mm Helicoil Thread Inserts


$22.99


M7 X 1.00 Perma-Coil Thread Repair Kit! Uses Helicoil


M7 X 1.00 Perma-Coil Thread Repair Kit! Uses Helicoil


$23.99


Helicoil M14X1.25 Sav-A-Thread Ht Spec Kit  5396-14


Helicoil M14X1.25 Sav-A-Thread Ht Spec Kit 5396-14


$216.99


UNC 10-24 Helicoil thread repair kit w/ 13 Inserts


UNC 10-24 Helicoil thread repair kit w/ 13 Inserts


$19.99


7/16


7/16″-14 Helicoil type thread repair kit


$18.00


50 NEW M6 X 1.00 X 9.0mm Helicoil Thread Inserts


50 NEW M6 X 1.00 X 9.0mm Helicoil Thread Inserts


$15.99


M5 X .80 Perma-Coil Thread Repair Kit! Uses Helicoil


M5 X .80 Perma-Coil Thread Repair Kit! Uses Helicoil


$14.99


FIX A THREAD SPARK PLUG SAVER REPAIR KIT M14 1.25 5 PC 14MM HELICOIL TAP


FIX A THREAD SPARK PLUG SAVER REPAIR KIT M14 1.25 5 PC 14MM HELICOIL TAP


$0.99


M12 X 1.25 Perma-Coil Thread Repair Kit Uses Helicoil Inserts


M12 X 1.25 Perma-Coil Thread Repair Kit Uses Helicoil Inserts


$43.99


5/16-24 Perma-Coil SAE Thread Repair Kit! Uses Helicoil


5/16-24 Perma-Coil SAE Thread Repair Kit! Uses Helicoil


$25.99


NEW Perma-Coil 10-32 Thread Repair Kit Uses Helicoil


NEW Perma-Coil 10-32 Thread Repair Kit Uses Helicoil


$23.99


20 NEW M10 X 1.50 X 15.0mm Helicoil Thread Inserts


20 NEW M10 X 1.50 X 15.0mm Helicoil Thread Inserts


$14.99


NEW Perma-Coil 9/16-12 Thread Repair Kit Uses Helicoil


NEW Perma-Coil 9/16-12 Thread Repair Kit Uses Helicoil


$35.99


20 NEW M10 X 1.00 X 15.0mm Helicoil Thread Inserts


20 NEW M10 X 1.00 X 15.0mm Helicoil Thread Inserts


$14.99


20 NEW M6 X 1.00 X 18.0mm Helicoil Thread Inserts


20 NEW M6 X 1.00 X 18.0mm Helicoil Thread Inserts


$17.99


M10 X 1.50 Perma-Coil Thread Repair Kit Uses Helicoil


M10 X 1.50 Perma-Coil Thread Repair Kit Uses Helicoil


$26.99


50 NEW M4 X .70 X 4.0mm Helicoil Thread Inserts


50 NEW M4 X .70 X 4.0mm Helicoil Thread Inserts


$15.99


50 NEW 12 - 24 X .324


50 NEW 12 – 24 X .324″ Helicoil Thread Inserts


$15.99


50 NEW M9 X 1.25 X 13.5mm Helicoil Thread Inserts


50 NEW M9 X 1.25 X 13.5mm Helicoil Thread Inserts


$24.99


NEW Perma-Coil 5/8-11 Thread Repair Kit Uses Helicoil


NEW Perma-Coil 5/8-11 Thread Repair Kit Uses Helicoil


$35.99


50 NEW 3/8


50 NEW 3/8″ – 16 X .562″ Helicoil Thread Inserts


$24.99


50 NEW M10 X 1.25 X 20.0mm Helicoil Thread Inserts


50 NEW M10 X 1.25 X 20.0mm Helicoil Thread Inserts


$29.99


50 NEW M3 X .50 X 4.5mm Helicoil Thread Inserts


50 NEW M3 X .50 X 4.5mm Helicoil Thread Inserts


$15.99


50 NEW 1/2


50 NEW 1/2″ – 20 X .750″ Helicoil Thread Inserts


$29.99


20 NEW 7/16 - 20 X .656


20 NEW 7/16 – 20 X .656″ Helicoil Thread Inserts


$14.99


20 NEW M12 X 1.25 X 24.0mm Helicoil Thread Inserts


20 NEW M12 X 1.25 X 24.0mm Helicoil Thread Inserts


$21.99


20 NEW M11 X 1.50 X 33.0mm Helicoil Thread Inserts


20 NEW M11 X 1.50 X 33.0mm Helicoil Thread Inserts


$34.99


20 NEW 1/2


20 NEW 1/2″ -13 X .750″ Helicoil Thread Inserts


$17.99


50 NEW 5/16


50 NEW 5/16″ – 18 X .312″ Helicoil Thread Inserts


$15.99


50 NEW 7/16


50 NEW 7/16″ – 20 X .656″ Helicoil Thread Inserts


$24.99


20 NEW 5/16 - 18 X .625


20 NEW 5/16 – 18 X .625″ Helicoil Thread Inserts


$14.99


NEW Perma-Coil 5-40 Thread Repair Kit Uses Helicoil


NEW Perma-Coil 5-40 Thread Repair Kit Uses Helicoil


$26.99


50 NEW M12 X 1.25 X 18.0mm Helicoil Thread Inserts


50 NEW M12 X 1.25 X 18.0mm Helicoil Thread Inserts


$34.99


50 NEW M8 X 1.25 X 20.0mm Helicoil Thread Inserts


50 NEW M8 X 1.25 X 20.0mm Helicoil Thread Inserts


$26.99


50 NEW 10 - 24 X .285


50 NEW 10 – 24 X .285″ Helicoil Thread Inserts


$15.99


50 NEW M5 X .80 X 10.0mm Helicoil Thread Inserts


50 NEW M5 X .80 X 10.0mm Helicoil Thread Inserts


$17.99


20 NEW 1/4


20 NEW 1/4″ – 28 X .375″ Helicoil Thread Inserts


$11.99


5/8 -18 Perma-Coil SAE Thread Repair Kit Uses Helicoil


5/8 -18 Perma-Coil SAE Thread Repair Kit Uses Helicoil


$43.99


20 NEW 3/8 - 24 X .750


20 NEW 3/8 – 24 X .750″ Helicoil Thread Inserts


$17.99


50 NEW 3/8


50 NEW 3/8″ – 24 X .375″ Helicoil Thread Inserts


$24.99


50 NEW M10 X 1.50 X 15.0mm Helicoil Thread Inserts


50 NEW M10 X 1.50 X 15.0mm Helicoil Thread Inserts


$24.99


20 NEW M6 X 1.00 X 12.0mm Helicoil Thread Inserts


20 NEW M6 X 1.00 X 12.0mm Helicoil Thread Inserts


$11.99


50 NEW M10 X 1.50 X 20.0mm Helicoil Thread Inserts


50 NEW M10 X 1.50 X 20.0mm Helicoil Thread Inserts


$29.99


20 NEW M6 X 1.00 X 9.0mm Helicoil Thread Inserts


20 NEW M6 X 1.00 X 9.0mm Helicoil Thread Inserts


$11.99


20 NEW M5 X .80 X 10.0mm Helicoil Thread Inserts


20 NEW M5 X .80 X 10.0mm Helicoil Thread Inserts


$13.99


20 NEW M11 X 1.50 X 16.5mm Helicoil Thread Inserts


20 NEW M11 X 1.50 X 16.5mm Helicoil Thread Inserts


$14.99


50 NEW M8 X 1.00 X 12.0mm Helicoil Thread Inserts


50 NEW M8 X 1.00 X 12.0mm Helicoil Thread Inserts


$24.99


NEW 9/16-18 Perma-Coil Thread Repair Kit Uses Helicoil


NEW 9/16-18 Perma-Coil Thread Repair Kit Uses Helicoil


$43.99


50 NEW 1/2


50 NEW 1/2″ – 13 X .750″ Helicoil Thread Inserts


$29.99


50 NEW 8 - 32 X .328 Helicoil Thread Inserts


50 NEW 8 – 32 X .328 Helicoil Thread Inserts


$17.99


50 NEW 3/8


50 NEW 3/8″ – 16 X .750″ Helicoil Thread Inserts


$32.99


20 NEW 3/8 - 24 X .562


20 NEW 3/8 – 24 X .562″ Helicoil Thread Inserts


$11.99


50 NEW M10 X 1.25 X 15.0mm Helicoil Thread Inserts


50 NEW M10 X 1.25 X 15.0mm Helicoil Thread Inserts


$24.99


20 NEW M4 X .70 X 6.0mm Helicoil Thread Inserts


20 NEW M4 X .70 X 6.0mm Helicoil Thread Inserts


$11.99


50 NEW M6 X 1.00 X 18.0mm Helicoil Thread Inserts


50 NEW M6 X 1.00 X 18.0mm Helicoil Thread Inserts


$37.99


50 NEW 3/8


50 NEW 3/8″ – 24 X .750″ Helicoil Thread Inserts


$32.99


50 NEW M12 X 1.75 X 18.0mm Helicoil Thread Inserts


50 NEW M12 X 1.75 X 18.0mm Helicoil Thread Inserts


$34.99


20 NEW M11 X 1.50 X 22.0mm Helicoil Thread Inserts


20 NEW M11 X 1.50 X 22.0mm Helicoil Thread Inserts


$16.99


M11 X 1.00 Perma-Coil Thread Repair Kit Uses Helicoil


M11 X 1.00 Perma-Coil Thread Repair Kit Uses Helicoil


$47.99


20 NEW M10 X 1.25 X 20.0mm Helicoil Thread Inserts


20 NEW M10 X 1.25 X 20.0mm Helicoil Thread Inserts


$16.99


50 NEW M8 X 1.25 X 16.0mm Helicoil Thread Inserts


50 NEW M8 X 1.25 X 16.0mm Helicoil Thread Inserts


$24.99


M6 X 1.00 Perma-Coil Thread Repair Kit! Uses Helicoil


M6 X 1.00 Perma-Coil Thread Repair Kit! Uses Helicoil


$25.99


NEW Perma-Coil 6-32 Thread Repair Kit Uses Helicoil


NEW Perma-Coil 6-32 Thread Repair Kit Uses Helicoil


$23.99


20 NEW 5 - 40 X .188


20 NEW 5 – 40 X .188″ Helicoil Thread Inserts


$10.99


50 NEW 1/4 - 28 X .375


50 NEW 1/4 – 28 X .375″ Helicoil Thread Inserts


$15.99


M12 X 1.75 Perma-Coil Thread Repair Kit Uses Helicoil


M12 X 1.75 Perma-Coil Thread Repair Kit Uses Helicoil


$34.99


20 NEW 5/16 - 18 X .312


20 NEW 5/16 – 18 X .312″ Helicoil Thread Inserts


$11.99


NEW Perma-Coil 7/16 -14 Thread Repair Kit Uses Helicoil


NEW Perma-Coil 7/16 -14 Thread Repair Kit Uses Helicoil


$23.99


M8 X 1.25 Perma-Coil Thread Repair Kit! Uses Helicoil


M8 X 1.25 Perma-Coil Thread Repair Kit! Uses Helicoil


$23.99


NEW! Perma-Coil Fine Thread Master Kit! Uses Helicoil!


NEW! Perma-Coil Fine Thread Master Kit! Uses Helicoil!


$139.99


NEW Perma-Coil 1/4-20 Thread Repair Kit Uses Helicoil


NEW Perma-Coil 1/4-20 Thread Repair Kit Uses Helicoil


$23.99


50 NEW 3/8


50 NEW 3/8″ – 16 X .375″ Helicoil Thread Inserts


$24.99


50 NEW 6 - 32 X .207


50 NEW 6 – 32 X .207″ Helicoil Thread Inserts


$15.99


20 NEW 10 - 32 X .285


20 NEW 10 – 32 X .285″ Helicoil Thread Inserts


$11.99


50 NEW M7 X 1.00 X 10.5mm Helicoil Thread Inserts


50 NEW M7 X 1.00 X 10.5mm Helicoil Thread Inserts


$22.99


50 NEW M6 X 1.00 X 12.0mm Helicoil Thread Inserts


50 NEW M6 X 1.00 X 12.0mm Helicoil Thread Inserts


$15.99


50 NEW M12 X 1.25 X 24.0mm Helicoil Thread Inserts


50 NEW M12 X 1.25 X 24.0mm Helicoil Thread Inserts


$47.99


20 NEW M11 X 1.25 X 16.5mm Helicoil Thread Inserts


20 NEW M11 X 1.25 X 16.5mm Helicoil Thread Inserts


$14.99


20 NEW 7/16 - 14 X .656


20 NEW 7/16 – 14 X .656″ Helicoil Thread Inserts


$14.99


20 NEW 5/8 - 18 X .938


20 NEW 5/8 – 18 X .938″ Helicoil Thread Inserts


$26.99


50 NEW 8 - 32 X .246 Helicoil Thread Inserts


50 NEW 8 – 32 X .246 Helicoil Thread Inserts


$15.99


50 NEW M12 X 1.50 X 24.0mm Helicoil Thread Inserts


50 NEW M12 X 1.50 X 24.0mm Helicoil Thread Inserts


$47.99


20 NEW M5 X .80 X 7.5mm Helicoil Thread Inserts


20 NEW M5 X .80 X 7.5mm Helicoil Thread Inserts


$11.99


50 NEW M11 X 1.50 X 33.0mm Helicoil Thread Inserts


50 NEW M11 X 1.50 X 33.0mm Helicoil Thread Inserts


$62.99


20 NEW 3/8 - 24 X .375


20 NEW 3/8 – 24 X .375″ Helicoil Thread Inserts


$12.99


NEW 1/2-20 Perma-Coil Thread Repair Kit Uses Helicoil


NEW 1/2-20 Perma-Coil Thread Repair Kit Uses Helicoil


$28.99


50 NEW 5/16 - 24 X .469


50 NEW 5/16 – 24 X .469″ Helicoil Thread Inserts New


$17.99


NEW Perma-Coil 4-40 Thread Repair Kit Uses Helicoil


NEW Perma-Coil 4-40 Thread Repair Kit Uses Helicoil


$26.99


NEW Perma-Coil 10-24 Thread Repair Kit! Uses Helicoil


NEW Perma-Coil 10-24 Thread Repair Kit! Uses Helicoil


$23.99


3/8-24 Perma-Coil SAE Thread Repair Kit! Uses Helicoil


3/8-24 Perma-Coil SAE Thread Repair Kit! Uses Helicoil


$25.99


M11 X 1.50 Perma-Coil Thread Repair Kit Uses Helicoil


M11 X 1.50 Perma-Coil Thread Repair Kit Uses Helicoil


$19.99


50 NEW 5/16


50 NEW 5/16″ – 18 X .469″ Helicoil Thread Inserts


$15.99


NEW Perma-Coil 5/16-18 Thread Repair Kit Uses Helicoil


NEW Perma-Coil 5/16-18 Thread Repair Kit Uses Helicoil


$23.99


CTA Tools 8240 Universal Rethreading Set, 53-Piece


CTA Tools 8240 Universal Rethreading Set, 53-Piece


$118.95


53 Pc. Universal Rethreading Set is a complete set of tools for all your rethreading needs. Kit includes Metric and SAE thread files.Complete Set Of Rethreading Tools For all Your NeedsSizes for All Metric- USS- SAEPacked in Blow Mold Case…

Helicoil (HEL55467) Thread Repair Kit - Coarse Metric M7 x 1 x 10.5mm, Drill Size 9/32


Helicoil (HEL55467) Thread Repair Kit – Coarse Metric M7 x 1 x 10.5mm, Drill Size 9/32


$27.96


Thread Repair Kit – Coarse Metric M7 x 1 x 10.5mm, Drill Size 9/32″…

Helicoil (HEL55212) Fractional Thread Repair Kit 8/32 x .246 NC


Helicoil (HEL55212) Fractional Thread Repair Kit 8/32 x .246 NC


$23.46


Each kit includes the appropriate reamer/tap, tool and stainless steel inserts required to repair a designated size thread. Drill size 11/64 in….

Helicoil R1185-7


Helicoil R1185-7


$6.66


Sold as 4 UNITS at $7.05 per unit. (1 unit = Cd/6.) Permanent screw threads. Diamond shaped wire. Driving “Tang” for installation, notched for removal. Carded/6. 7/16″ -14 x .656 USS Coarse . Manufacturer number: R1185-7. SKU #: 85871. Country of origin: (TBA). Distributed by Heli-Coil Division….

Time-Sert Ford Triton Spark Plug Repair Kit # 5553


Time-Sert Ford Triton Spark Plug Repair Kit # 5553


$389.79


This complete, extremely high quality kit makes it possible to permanently repair previously non-repairable cylinder heads without removing them from the engine! BIG-SERT kits are an oversize thread repair system that will repair threads that were repaired by standard Time-Serts, Helicoil, Perma-Coil, any other similar coil style insert….

Helicoil 5334-14 Save-A-Thread Thread Repair Kit M14 x 1.25


Helicoil 5334-14 Save-A-Thread Thread Repair Kit M14 x 1.25


$42.20


The only thread repair product that can be used to repair both taper seat and gasket type spark plug assembliesThree insert lengths are available to accommodate all spark plug reachesPositive mechanical locking feature means the insert will never come out! The piloted reamer tap means no drilling is necessary and perfect alignment of the tapped holeAvailable in kit or set for the do-it-yourselfer …

Helicoil 5546-6 M6 x 1 Metric Coarse Thread Repair Kit


Helicoil 5546-6 M6 x 1 Metric Coarse Thread Repair Kit


$21.29


Contains Heli-Coil installation tool, a quantity of inserts and complete instructions12 InsertsDrill size: 1/4 …

Various Manufacturers 10 x 1mm Helicoil Thread Insert


Various Manufacturers 10 x 1mm Helicoil Thread Insert


$3.99


Hardened-steel inserts replace damaged threads in most metals…

Various Manufacturers 10 x 1mm Helicoil Thread Insert


Various Manufacturers 10 x 1mm Helicoil Thread Insert


$3.99


Various Manufacturers Thread Repair parts and kits.Hardened-steel inserts replace damaged threads in most metalsThe Drill bit, Tap & tool that come with the TL1800 kit are required to use the Helicoils…

10 x 1mm Thread Repair Kit


10 x 1mm Thread Repair Kit


$98.91


Various Manufacturers Thread Repair parts and kits.For rear derailleur hangerIncludes insertion tool, drill bit, proprietary tap and 12 inserts…


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