Spark Plug Kits Archives - Thread Doctor https://www.threaddoctor.com/product-category/spark-plug-kits/ Time-Sert Thread Repair Kits - Authorized Time-Sert Distributor Fri, 17 Apr 2026 19:41:50 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 Time-Sert 4010EXT-133 M10 x 1.0 Extended Spark Plug Kit https://www.threaddoctor.com/product/time-sert-4010ext-133-m10-x-1-0-extended-spark-plug-kit/ https://www.threaddoctor.com/product/time-sert-4010ext-133-m10-x-1-0-extended-spark-plug-kit/#respond Fri, 17 Apr 2026 19:39:32 +0000 https://www.threaddoctor.com/?post_type=product&p=8112 Time-Sert 4010EXT-133 M10 x 1.0 Extended Spark Plug Kit Time Sert thread repair kits are approved by leading automotive manufactures. Time-Sert easily repairs stripped threads in cylinder head bolts, spark plug holes and oil drain pans as well. Many thread repair kits are available for your threaded bushing application in metric and american sizes. Time-Sert […]

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]]> Time-Sert 4010EXT-133 M10 x 1.0 Extended Spark Plug Kit

Time Sert thread repair kits are approved by leading automotive manufactures. Time-Sert easily repairs stripped threads in cylinder head bolts, spark plug holes and oil drain pans as well.

Many thread repair kits are available for your threaded bushing application in metric and american sizes. Time-Sert is the very best in thread repair!

Time Sert 4010EXT-133 thread repair kits are made in the United States.

Inserts Included

  • (2) Time-Sert 40101 M10 x 1.0 x 9mm
  • (3) Time-Sert 40103 M10 x 1.0 x 15mm

Click Here to purchase additional Spark Plug Washer Seat Inserts

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]]> https://www.threaddoctor.com/product/time-sert-4010ext-133-m10-x-1-0-extended-spark-plug-kit/feed/ 0 Time-Sert 4815 M18 x 1.5mm Metric Spark Plug Thread Repair Kit https://www.threaddoctor.com/product/time-sert-4815-m18-x-1-5mm-metric-spark-plug-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-4815-m18-x-1-5mm-metric-spark-plug-thread-repair-kit/#respond Wed, 24 Sep 2025 17:15:44 +0000 https://www.threaddoctor.com/?post_type=product&p=7523 Time Sert 4815 M18 x 1.5 spark plug repair kit Time Sert thread repair kits are approved by leading automotive manufactures. Time-Sert easily repairs stripped threads in cylinder head bolts, spark plug holes and oil drain pans as well. Many thread repair kits are available for your threaded bushing application in metric and american sizes. […]

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]]> Time Sert 4815 M18 x 1.5 spark plug repair kit

Time Sert thread repair kits are approved by leading automotive manufactures. Time-Sert easily repairs stripped threads in cylinder head bolts, spark plug holes and oil drain pans as well.

Many thread repair kits are available for your threaded bushing application in metric and american sizes. Time-Sert is the very best in thread repair!

Time Sert 4815 thread repair kits are made in the United States.

Click here: for video instructions

Order Washer Seat Inserts Click Here

Order Taper Seat Inserts Click Here

Get Useful Tools, Tap Guides, and More Click Here

Click Here For Instructions

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]]> https://www.threaddoctor.com/product/time-sert-4815-m18-x-1-5mm-metric-spark-plug-thread-repair-kit/feed/ 0 Time-Sert 42129 M12 x 1.25 x 24mm Spark Plug Washer Seat Insert https://www.threaddoctor.com/product/time-sert-42129-m12-x-1-25-x-24mm-spark-plug-washer-seat-insert/ https://www.threaddoctor.com/product/time-sert-42129-m12-x-1-25-x-24mm-spark-plug-washer-seat-insert/#respond Fri, 31 Jan 2025 19:51:04 +0000 https://www.threaddoctor.com/?post_type=product&p=6458 Time-Sert 42129 M12 x 1.25 x 24mm Spark Plug Washer Seat Insert WASHER SEAT SPARK PLUG INSERTS Copper Plated M12x1.25 Time Sert inserts self locking. On installation the bottom internal threads of the insert are cold rolled to expand the mating external threads into the base material locking the insert in place. Inserts are sold […]

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]]> Time-Sert 42129 M12 x 1.25 x 24mm Spark Plug Washer Seat Insert

WASHER SEAT
SPARK PLUG
INSERTS
Copper Plated
M12x1.25

Time Sert inserts self locking. On installation the bottom internal threads of the insert are cold rolled to expand the mating external threads into the base material locking the insert in place.

Inserts are sold in 10 packs.

The post Time-Sert 42129 M12 x 1.25 x 24mm Spark Plug Washer Seat Insert appeared first on Thread Doctor.

]]> https://www.threaddoctor.com/product/time-sert-42129-m12-x-1-25-x-24mm-spark-plug-washer-seat-insert/feed/ 0 Time-Sert 40102 M10 x 1.0 x .472/12.0mm Spark Plug Washer Seat Insert https://www.threaddoctor.com/product/time-sert-40102-m10-x-1-0-x-472-12-0mm-spark-plug-washer-seat-insert/ https://www.threaddoctor.com/product/time-sert-40102-m10-x-1-0-x-472-12-0mm-spark-plug-washer-seat-insert/#respond Fri, 31 Jan 2025 19:34:33 +0000 https://www.threaddoctor.com/?post_type=product&p=6452 Time-Sert 40102 M10 x 1.0 x .472/12.0mm Spark Plug Washer Seat Insert GLOW PLUG INSERTS copper plated M10 x 1.0 x 12.0MM Time Sert inserts self locking. On installation the bottom internal threads of the insert are cold rolled to expand the mating external threads into the base material locking the insert in place. Inserts […]

The post Time-Sert 40102 M10 x 1.0 x .472/12.0mm Spark Plug Washer Seat Insert appeared first on Thread Doctor.

]]> Time-Sert 40102 M10 x 1.0 x .472/12.0mm Spark Plug Washer Seat Insert
GLOW PLUG
INSERTS
copper plated
M10 x 1.0 x 12.0MM

Time Sert inserts self locking. On installation the bottom internal threads of the insert are cold rolled to expand the mating external threads into the base material locking the insert in place.

Inserts are sold in 10 packs.

The post Time-Sert 40102 M10 x 1.0 x .472/12.0mm Spark Plug Washer Seat Insert appeared first on Thread Doctor.

]]> https://www.threaddoctor.com/product/time-sert-40102-m10-x-1-0-x-472-12-0mm-spark-plug-washer-seat-insert/feed/ 0 Time-Sert 34156 M14 Drain Plug Seat Reconditioner https://www.threaddoctor.com/product/time-sert-34156-m14-drain-plug-seat-reconditioner/ https://www.threaddoctor.com/product/time-sert-34156-m14-drain-plug-seat-reconditioner/#respond Thu, 29 Aug 2024 12:33:40 +0000 https://www.threaddoctor.com/?post_type=product&p=6129 This tool reconditions the seat where the drain plug seals. If the hole was tapped in a slight angle this tool will square it up for a good seal to stop any leaks. You need kit 1415C or 1415A driver to use this cutter.

The post Time-Sert 34156 M14 Drain Plug Seat Reconditioner appeared first on Thread Doctor.

]]> This tool reconditions the seat where the drain plug seals. If the hole was tapped in a slight angle this tool will square it up for a good seal to stop any leaks. You need kit 1415C or 1415A driver to use this cutter.

The post Time-Sert 34156 M14 Drain Plug Seat Reconditioner appeared first on Thread Doctor.

]]> https://www.threaddoctor.com/product/time-sert-34156-m14-drain-plug-seat-reconditioner/feed/ 0 Time-Sert 4412E-111 M14 x 1.25mm Metric Spark Plug Thread Repair Kit https://www.threaddoctor.com/product/time-sert-4412e-111-m14-x-1-25mm-metric-spark-plug-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-4412e-111-m14-x-1-25mm-metric-spark-plug-thread-repair-kit/#respond Fri, 01 Mar 2024 13:31:26 +0000 https://www.threaddoctor.com/?post_type=product&p=5740 Time Sert 4412E M14 x 1.25 spark plug repair tooling 5 inserts with 16.8mm metric length – Part # 44111 Extended: For applications that require deeper reach into the head. The 4412E tooling works very well in holes 6″ deep or more. The installation is exactly the same for taper seat or washer seat you […]

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]]> Time Sert 4412E M14 x 1.25 spark plug repair tooling

5 inserts with 16.8mm metric length – Part # 44111

Extended:
For applications that require deeper reach into the head.
The 4412E tooling works very well in holes 6″ deep or more.

The installation is exactly the same for taper seat or washer
seat you only need the appropriate length/style of insert.

Time Sert thread repair kits are approved by leading automotive manufactures. Time-Sert easily repairs stripped threads in cylinder head bolts, spark plug holes and oil drain pans as well.

Many thread repair kits are available for your threaded bushing application in metric and american sizes. Time-Sert is the very best in thread repair!

Time Sert 4412E thread repair kits are made in the United States.

The post Time-Sert 4412E-111 M14 x 1.25mm Metric Spark Plug Thread Repair Kit appeared first on Thread Doctor.

]]> https://www.threaddoctor.com/product/time-sert-4412e-111-m14-x-1-25mm-metric-spark-plug-thread-repair-kit/feed/ 0 Time-Sert 4412E M14 x 1.25 Deep Hole Metric Spark Plug Thread Repair Kit https://www.threaddoctor.com/product/time-sert-4412e-m14-x-1-25-deep-hole-metric-spark-plug-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-4412e-m14-x-1-25-deep-hole-metric-spark-plug-thread-repair-kit/#respond Fri, 01 Mar 2024 13:27:54 +0000 https://www.threaddoctor.com/?post_type=product&p=5737 Time Sert 4412E M14 x 1.25 spark plug repair tooling Extended: For applications that require deeper reach into the head. The 4412E tooling works very well in holes 6″ deep or more. The installation is exactly the same for taper seat or washer seat you only need the appropriate length/style of insert. Kit does not […]

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]]> Time Sert 4412E M14 x 1.25 spark plug repair tooling

Extended:
For applications that require deeper reach into the head.
The 4412E tooling works very well in holes 6″ deep or more.

The installation is exactly the same for taper seat or washer
seat you only need the appropriate length/style of insert.
Kit does not include inserts order separately.

Time Sert thread repair kits are approved by leading automotive manufactures. Time-Sert easily repairs stripped threads in cylinder head bolts, spark plug holes and oil drain pans as well.

Many thread repair kits are available for your threaded bushing application in metric and american sizes. Time-Sert is the very best in thread repair!

Time Sert 4412E thread repair kits are made in the United States.

THIS KIT DOES NOT CONTAIN INSERTS.

PLEASE ORDER YOUR INSERTS FROM THE LINKS BELOW.

The post Time-Sert 4412E M14 x 1.25 Deep Hole Metric Spark Plug Thread Repair Kit appeared first on Thread Doctor.

]]> https://www.threaddoctor.com/product/time-sert-4412e-m14-x-1-25-deep-hole-metric-spark-plug-thread-repair-kit/feed/ 0 Time-Sert 4412E-187 M14 x 1.25mm Metric Spark Plug Thread Repair Kit https://www.threaddoctor.com/product/time-sert-4412e-187-m14-x-1-25mm-metric-spark-plug-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-4412e-187-m14-x-1-25mm-metric-spark-plug-thread-repair-kit/#respond Fri, 01 Mar 2024 13:22:36 +0000 https://www.threaddoctor.com/?post_type=product&p=5727 Time Sert 4412E M14 x 1.25 spark plug repair tooling 2 inserts each included of the 24mm, 15.7mm & 10mm reach inserts. Extended: For applications that require deeper reach into the head. The 4412E tooling works very well in holes 6″ deep or more. The installation is exactly the same for taper seat or washer […]

The post Time-Sert 4412E-187 M14 x 1.25mm Metric Spark Plug Thread Repair Kit appeared first on Thread Doctor.

]]> Time Sert 4412E M14 x 1.25 spark plug repair tooling

2 inserts each included of the 24mm, 15.7mm & 10mm reach inserts.

Extended:
For applications that require deeper reach into the head.
The 4412E tooling works very well in holes 6″ deep or more.

The installation is exactly the same for taper seat or washer
seat you only need the appropriate length/style of insert.

Time Sert thread repair kits are approved by leading automotive manufactures. Time-Sert easily repairs stripped threads in cylinder head bolts, spark plug holes and oil drain pans as well.

Many thread repair kits are available for your threaded bushing application in metric and American sizes. Time-Sert is the very best in thread repair!

Time Sert 4412E thread repair kits are made in the United States.

The post Time-Sert 4412E-187 M14 x 1.25mm Metric Spark Plug Thread Repair Kit appeared first on Thread Doctor.

]]> https://www.threaddoctor.com/product/time-sert-4412e-187-m14-x-1-25mm-metric-spark-plug-thread-repair-kit/feed/ 0 Time-Sert 4412-321 M14 x 1.25mm Metric Spark Plug Thread Repair Kit https://www.threaddoctor.com/product/time-sert-4412-321-m14-x-1-25mm-metric-spark-plug-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-4412-321-m14-x-1-25mm-metric-spark-plug-thread-repair-kit/#respond Fri, 01 Mar 2024 13:13:10 +0000 https://www.threaddoctor.com/?post_type=product&p=5723 Time Sert M14 x 1.25 spark plug repair short tooling Normally used on vehicles that the spark plug is near the surface. Examples would be small engine repair as in mopeds, lawn mowers, out board motors and some motorcycles. These applications would not require long reach tools. The 4412 kit is used for washer seat […]

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]]> Time Sert M14 x 1.25 spark plug repair short tooling

Normally used on vehicles that the spark plug is near the surface.

Examples would be small engine repair as in mopeds, lawn mowers, out board motors
and some motorcycles. These applications would not require long reach tools.

The 4412 kit is used for washer seat as well as tapered seat applications.
The installation is exactly the same for taper seat or washer seat you only
need the appropriate length/style of insert.

Time Sert thread repair kits are approved by leading automotive manufactures. Time-Sert easily repairs stripped threads in cylinder head bolts, spark plug holes and oil drain pans as well.

Time Sert 4412 thread repair kits are made in the United States.

Includes 5 Spark Plug Inserts – Three (3) Time-Sert 44125 M14 x 1.25 x 9.4mm and Two (2) Time-Sert 44111 M14 x 1.25 x 16.8mm

The post Time-Sert 4412-321 M14 x 1.25mm Metric Spark Plug Thread Repair Kit appeared first on Thread Doctor.

]]> https://www.threaddoctor.com/product/time-sert-4412-321-m14-x-1-25mm-metric-spark-plug-thread-repair-kit/feed/ 0 Time-Sert 4412 M14 x 1.25mm Metric Spark Plug Thread Repair Kit https://www.threaddoctor.com/product/time-sert-4412-m14-x-1-25mm-metric-spark-plug-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-4412-m14-x-1-25mm-metric-spark-plug-thread-repair-kit/#respond Fri, 01 Mar 2024 13:10:30 +0000 https://threaddoctor.com/?post_type=product&p=3942 Time Sert M14 x 1.25 spark plug repair short tooling Normally used on vehicles that the spark plug is near the surface. Examples would be small engine repair as in mopeds, lawn mowers, out board motors and some motorcycles. These applications would not require long reach tools. The 4412 kit is used for washer seat […]

The post Time-Sert 4412 M14 x 1.25mm Metric Spark Plug Thread Repair Kit appeared first on Thread Doctor.

]]> Time Sert M14 x 1.25 spark plug repair short tooling

Normally used on vehicles that the spark plug is near the surface.

Examples would be small engine repair as in mopeds, lawn mowers, out board motors
and some motorcycles. These applications would not require long reach tools.

The 4412 kit is used for washer seat as well as tapered seat applications.
The installation is exactly the same for taper seat or washer seat you only
need the appropriate length/style of insert.

Time Sert thread repair kits are approved by leading automotive manufactures. Time-Sert easily repairs stripped threads in cylinder head bolts, spark plug holes and oil drain pans as well.

Many thread repair kits are available for your threaded bushing application in metric and american sizes. Time-Sert is the very best in thread repair!

Time Sert 4412 thread repair kits are made in the United States.

THIS KIT DOES NOT CONTAIN INSERTS.

PLEASE ORDER YOUR INSERTS FROM THE LINKS BELOW.

The post Time-Sert 4412 M14 x 1.25mm Metric Spark Plug Thread Repair Kit appeared first on Thread Doctor.

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