Head Bolt Kits Archives - Thread Doctor https://www.threaddoctor.com/product-category/head-bolt-kits/ Time-Sert Thread Repair Kits - Authorized Time-Sert Distributor Fri, 25 Jul 2025 14:38:18 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 Time-Sert EN-42385-58 M12 x 1.75 x 35mm Head Bolt Insert https://www.threaddoctor.com/product/time-sert-en-42385-58-m12-x-1-75-x-35mm-head-bolt-insert/ https://www.threaddoctor.com/product/time-sert-en-42385-58-m12-x-1-75-x-35mm-head-bolt-insert/#respond Fri, 25 Jul 2025 14:36:50 +0000 https://www.threaddoctor.com/?post_type=product&p=6957 Special GM Insert M12 x 1.75 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. This insert is designed to work with the Special GM kit M12 x 1.75 p/n EN-42385-50 head […]

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]]> Special GM Insert M12 x 1.75

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.

This insert is designed to work with the Special GM kit M12 x 1.75 p/n EN-42385-50 head bolt. If you have the universal head bolt kit part number 4900 the 35mm insert would be too long  you must use the shorter 30mm reach p/n 12179.

Inserts are sold in 10 packs.

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]]> https://www.threaddoctor.com/product/time-sert-en-42385-58-m12-x-1-75-x-35mm-head-bolt-insert/feed/ 0 Time-Sert EN-42385-50 M12 x 1.75 Gen V Head Bolt Thread Repair Kit https://www.threaddoctor.com/product/time-sert-en-42385-50-m12-x-1-75-gen-v-head-bolt-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-en-42385-50-m12-x-1-75-gen-v-head-bolt-thread-repair-kit/#respond Fri, 25 Jul 2025 14:32:38 +0000 https://www.threaddoctor.com/?post_type=product&p=6948 Time-Sert EN-42385-50 is a M12 x 1.75 Head Bolt Thread Repair Kit used for Gen V engines. This kit is used for first time thread repairs. Application 2015 LS9 2014 Corvette 6.2L V8 Full-size Trucks 4.3L V6, 5.3L V8 or 6.2L V8 Silverado, Sierra, Tahoe, Yukon, Escalade or Suburban Kit Includes Tap Step Drill with […]

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]]> Time-Sert EN-42385-50 is a M12 x 1.75 Head Bolt Thread Repair Kit used for Gen V engines. This kit is used for first time thread repairs.

Application

  • 2015 LS9
  • 2014 Corvette 6.2L V8
  • Full-size Trucks 4.3L V6, 5.3L V8 or 6.2L V8 Silverado, Sierra, Tahoe, Yukon, Escalade or Suburban

Kit Includes

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]]> https://www.threaddoctor.com/product/time-sert-en-42385-50-m12-x-1-75-gen-v-head-bolt-thread-repair-kit/feed/ 0 Time-Sert 11125 M11 X 1.25 Universal Head Bolt Thread Repair Kit https://www.threaddoctor.com/product/time-sert-11125-m11-x-1-25-universal-head-bolt-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-11125-m11-x-1-25-universal-head-bolt-thread-repair-kit/#respond Thu, 16 Nov 2023 20:52:12 +0000 https://www.threaddoctor.com/?post_type=product&p=5575 The Time-Sert 11125 M11 X 1.25 Universal Head Bolt Thread Repair Kit Is Commonly Used On Subaru’s, Nissan And Infinite Vehicles. Time-Sert 11125 Is A Universal Head Bolt Thread Repair Kit And Can Be Used In A Variety Of Applications In The Size Available. The Time Sert 11125 Kit Includes Twelve (12) Time-Sert 11127 Carbon Steel Inserts. […]

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]]> The Time-Sert 11125 M11 X 1.25 Universal Head Bolt Thread Repair Kit Is Commonly Used On Subaru’s, Nissan And Infinite Vehicles. Time-Sert 11125 Is A Universal Head Bolt Thread Repair Kit And Can Be Used In A Variety Of Applications In The Size Available.

The Time Sert 11125 Kit Includes Twelve (12) Time-Sert 11127 Carbon Steel Inserts.

 

The Time-Sert 11125 Head Bolt Thread Repair Kit Includes FREE 2 Day Shipping.

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]]> https://www.threaddoctor.com/product/time-sert-11125-m11-x-1-25-universal-head-bolt-thread-repair-kit/feed/ 0 Time-Sert 6250 M10 x 1.25mm Universal Head Bolt Thread Repair Kit https://www.threaddoctor.com/product/time-sert-6250-m10-x-1-25mm-universal-head-bolt-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-6250-m10-x-1-25mm-universal-head-bolt-thread-repair-kit/#respond Fri, 29 Sep 2023 15:08:57 +0000 https://threaddoctor.com/?post_type=product&p=5411 Time-Sert 6250 M10X1.25MM Universal Head Bolt Thread Repair Kit. Time Sert thread repair kits made in United States. Time Sert 6250 thread repair kit. Universal head bolt kits can be used in any application in size available. A simple tool setup is all that is required read more in the instructions. There are 10 inserts […]

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Time-Sert 6250 M10X1.25MM Universal Head Bolt Thread Repair Kit. Time Sert thread repair kits made in United States. Time Sert 6250 thread repair kit.

Universal head bolt kits can be used in any application in size available.
A simple tool setup is all that is required read more in the instructions.

There are 10 inserts included in each Universal head bolt kit

Click here: for video instructions

Order Carbon Steel 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-6250-m10-x-1-25mm-universal-head-bolt-thread-repair-kit/feed/ 0 Time-Sert 4900 M12 x 1.75mm Universal Head Bolt Thread Repair Kit https://www.threaddoctor.com/product/time-sert-4900-m12-x-1-75mm-universal-head-bolt-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-4900-m12-x-1-75mm-universal-head-bolt-thread-repair-kit/#respond Fri, 29 Sep 2023 15:04:38 +0000 https://threaddoctor.com/?post_type=product&p=5399 Time-Sert 4900 M12 x 1.75mm Universal Head Bolt Thread Repair Kit. Time Sert thread repair kits made in United States. Time Sert 4900 thread repair kit. Universal head bolt kits can be used in any application in size available. A simple tool setup is all that is required read more in the instructions. There are […]

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Time-Sert 4900 M12 x 1.75mm Universal Head Bolt Thread Repair Kit. Time Sert thread repair kits made in United States. Time Sert 4900 thread repair kit.

Universal head bolt kits can be used in any application in size available.
A simple tool setup is all that is required read more in the instructions.

There are 10 inserts included in each Universal head bolt kit

M12 x 1.75mm

Click here: for video instructions

Order Carbon Steel 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-4900-m12-x-1-75mm-universal-head-bolt-thread-repair-kit/feed/ 0 Time-Sert 4800 M12 x 1.5mm Universal Head Bolt Thread Repair Kit https://www.threaddoctor.com/product/time-sert-4800-m12-x-1-5mm-universal-head-bolt-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-4800-m12-x-1-5mm-universal-head-bolt-thread-repair-kit/#respond Fri, 29 Sep 2023 15:01:32 +0000 https://threaddoctor.com/?post_type=product&p=5387 Time-Sert 4800 M12 x 1.5mm  Universal Head Bolt Thread Repair Kit. Time Sert thread repair kits made in United States. Time Sert 4800 thread repair kit. Universal head bolt kits can be used in any application in size available. A simple tool setup is all that is required read more in the instructions. There are […]

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Time-Sert 4800 M12 x 1.5mm  Universal Head Bolt Thread Repair Kit. Time Sert thread repair kits made in United States. Time Sert 4800 thread repair kit.

Universal head bolt kits can be used in any application in size available.
A simple tool setup is all that is required read more in the instructions.

There are 10 inserts included in each Universal head bolt kit

Click here: for video instructions

Order Carbon Steel Inserts Click Here

Get Useful Tools, Tap Guides, and More Click Here

 Click Here for Instructions

The post Time-Sert 4800 M12 x 1.5mm Universal Head Bolt Thread Repair Kit appeared first on Thread Doctor.

]]> https://www.threaddoctor.com/product/time-sert-4800-m12-x-1-5mm-universal-head-bolt-thread-repair-kit/feed/ 0 Time-Sert 4700 M12 x 1.25mm Universal Head Bolt Thread Repair Kit https://www.threaddoctor.com/product/time-sert-4700-m12-x-1-25mm-universal-head-bolt-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-4700-m12-x-1-25mm-universal-head-bolt-thread-repair-kit/#respond Fri, 29 Sep 2023 14:58:18 +0000 https://threaddoctor.com/?post_type=product&p=5374 Time-Sert 4700 M12 x 1.25mm Universal Head Bolt Thread Repair Kit. Time Sert head bolt thread repair kits made in USA. Time Sert 4700 Thread Repair Kits. Universal head bolt kits can be used in any application in size available. A simple tool setup is all that is required read more in the instructions. There […]

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Time-Sert 4700 M12 x 1.25mm Universal Head Bolt Thread Repair Kit. Time Sert head bolt thread repair kits made in USA. Time Sert 4700 Thread Repair Kits.

Universal head bolt kits can be used in any application in size available.
A simple tool setup is all that is required read more in the instructions.

There are 10 inserts included in each Universal head bolt kit

 

Click here: for video instructions

Order Carbon Steel Inserts Click Here

Get Useful Tools, Tap Guides, and More Click Here

 Click Here for Instructions

The post Time-Sert 4700 M12 x 1.25mm Universal Head Bolt Thread Repair Kit appeared first on Thread Doctor.

]]> https://www.threaddoctor.com/product/time-sert-4700-m12-x-1-25mm-universal-head-bolt-thread-repair-kit/feed/ 0 Time-Sert 3700 M11 x 2.0mm Universal Head Bolt Thread Repair Kit https://www.threaddoctor.com/product/time-sert-3700-m11-x-2-0mm-universal-head-bolt-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-3700-m11-x-2-0mm-universal-head-bolt-thread-repair-kit/#respond Fri, 29 Sep 2023 14:55:18 +0000 https://threaddoctor.com/?post_type=product&p=5373 Time-Sert 3700 M11 x 2.0mm Universal Head Bolt Thread Repair Kit. Time Sert M11 x 2.0mm Universal Head Bolt Kits Made in USA. Time Sert 3700 Thread Repair Kits. Time-Sert 3700 M11 x 2.0mm Universal Head Bolt Thread Repair Kit  Universal head bolt kits can be used in any application in size available. A simple […]

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]]> Time-Sert 3700 M11 x 2.0mm Universal Head Bolt Thread Repair Kit. Time Sert M11 x 2.0mm Universal Head Bolt Kits Made in USA. Time Sert 3700 Thread Repair Kits.

Time-Sert 3700 M11 x 2.0mm Universal Head Bolt Thread Repair Kit 

Universal head bolt kits can be used in any application in size available.
A simple tool setup is all that is required read more in the instructions.

There are 10 inserts included in each Universal head bolt kit

Click here: for video instructions

Order Carbon Steel Inserts Click Here

 Click Here for Instructions

The post Time-Sert 3700 M11 x 2.0mm Universal Head Bolt Thread Repair Kit appeared first on Thread Doctor.

]]> https://www.threaddoctor.com/product/time-sert-3700-m11-x-2-0mm-universal-head-bolt-thread-repair-kit/feed/ 0 Time-Sert 2200 M11 x 1.5mm Universal Head Bolt Thread Repair Kit https://www.threaddoctor.com/product/time-sert-2200-m11-x-1-5mm-universal-head-bolt-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-2200-m11-x-1-5mm-universal-head-bolt-thread-repair-kit/#respond Fri, 29 Sep 2023 14:48:54 +0000 https://threaddoctor.com/?post_type=product&p=5360 Time-Sert 2200 M11 x 1.5mm Universal Head Bolt Thread Repair Kit. Time Sert 2200 Thread Repair Kits Made in USA. Time Sert 2200 thread repair kit. Universal head bolt kits can be used in any application in size available. A simple tool setup is all that is required read more in the instructions. There are […]

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Time-Sert 2200 M11 x 1.5mm Universal Head Bolt Thread Repair Kit. Time Sert 2200 Thread Repair Kits Made in USA. Time Sert 2200 thread repair kit.

Universal head bolt kits can be used in any application in size available.
A simple tool setup is all that is required read more in the instructions.

There are 10 inserts included in each Universal head bolt kit

 

Click here: for video instructions

Order Carbon Steel Inserts Click Here

Get Useful Tools, Tap Guides, and More Click Here

Click Here for Instructions

The post Time-Sert 2200 M11 x 1.5mm Universal Head Bolt Thread Repair Kit appeared first on Thread Doctor.

]]> https://www.threaddoctor.com/product/time-sert-2200-m11-x-1-5mm-universal-head-bolt-thread-repair-kit/feed/ 0 Time-Sert 15100 1/2-13 Subaru Conversion High Horsepower Head Bolt Thread Repair Kit https://www.threaddoctor.com/product/time-sert-15100-1-2-13-subaru-conversion-high-horsepower-head-bolt-thread-repair-kit/ https://www.threaddoctor.com/product/time-sert-15100-1-2-13-subaru-conversion-high-horsepower-head-bolt-thread-repair-kit/#respond Fri, 29 Sep 2023 14:45:47 +0000 https://threaddoctor.com/?post_type=product&p=5346 Time-Sert 15100 1/2-13 Subaru Conversion High HP Head Bolt Thread Repair Kit TIME-SERT 1/2-13 Subaru Conversion Special High Horsepower application converts M11x1.25 to 1/2-13 There are 12 inserts included in each Time-Sert 15100 Universal head bolt kit Insert Size: 1/2-13 x 1.180

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Time-Sert 15100 1/2-13 Subaru Conversion High HP Head Bolt Thread Repair Kit

TIME-SERT 1/2-13 Subaru Conversion
Special High Horsepower application converts M11x1.25 to 1/2-13

There are 12 inserts included in each Time-Sert 15100 Universal head bolt kit

Insert Size: 1/2-13 x 1.180

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