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TIME SERT 4900BS Big Sert Universal Metric Head Bolt Thread Kit M12x1.75

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4900 BS
In Stock
6.00 LBS
Calculated at Checkout
  • TIME SERT 4900 BS Metric Head Bolt Thread Kit 12x1.75 Oversize (4900BS)
  • TIME SERT 4900 BS Metric Head Bolt Thread Kit 12x1.75 Oversize (4900BS) chart


Includes Free Shipping. This BS (Big Sert) kit which has an oversize outside diameter is commonly used when Heli-Coil or similar type thread repairs have failed. 10 Inserts are included - PN 52175.

 Time-Sert Big Sert Universal Instructions pdf 

Mouse over the images above for a more detailed view of the kit components. 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.


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1 Review

  • 5
    Damn good product, throw away your Helicoil

    Posted by Kevin T on 9th Mar 2017

    Best kit ever, very complete kit and the instructions provided were great.

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