Free Shipping Within USA Starting at $199


Time-Sert 42123 One Spark Plug Washer Seat Thread Insert M12x1.25 15mm

(2 reviews) Write a Review
In Stock
0.20 LBS
Calculated at Checkout
On Sale
  • Time-Sert 42123 Spark Plug Washer Seat Thread Insert M12x1.25 15mm (42123)
  • Time-Sert 42123 One Spark Plug Washer Seat Thread Insert M12x1.25 15mm
Now: $3.57
Was: $20.00


Time Sert 42123 Single Replacement Thread Insert M12x1.25 15mm. Listing is for ONE replacement insert. Commonly used in the 4212 and 4212E thread repair kits.

Mouse over the images above for a more detailed view of the kit components. Also notice our bulk discount prices on TIME-SERT replacement inserts for thread repair kits. Need more information on TIME-SERT thread repair kits? Visit our auto repair blog section on thread repair kits for tips, advice and all your thread repair questions answered. Just comment and we will be quick to respond.

See the pdficon-small.png TIME-SERT products pdf for more information on thread repair kits and inserts. Some are listed for certain applications on cars, trucks and motorcycles. The pdf is a partial application list so feel free to email or call if we can assist with your particular need. We also accept inquiries regarding our daily TIME-SERT specials. Remember TIME-SERT is recommended by leading car manufacturers like the General Motors Corporation. In fact TIME-SERT is GM's only authorized repair for head bolt threads.



View AllClose

2 Reviews

  • 5

    Install kit and parts

    Posted by Mike on 8th May 2022

    Worked perfectly, I had the advantage of having the heads off so it made the messy end of the job easier to clean up but I’m more than pleased with the results, thanks also to Dennis for walking me thru the size process, that certainly helped.

  • 5

    Repair On 2011 FLHX

    Posted by Kevin K on 7th May 2016

    Insert worked perfect on 2011 Streetglide. Length was correct for sparkplug.

View AllClose