The C-Sert System Q&A
Do I need a tap to install a C-Sert?
No. C-Serts are self-tapping.
Do I need thread locker?
No. Every drop would just get squeezed out.
What keeps C-Serts in?
Purely & simply friction. The C-Sert’s external tapping threads produce more friction than the bolt’s torque rating.
Can I remove a C-Sert?
Yes. Just use the same hex installer, but turn it clockwise. But, really, Why would you? After all, the C-Sert is a permanent repair.
If I remove a C-Sert, can I use it to repair another hole?
Yes, you can.
Why do C-Serts have left-handed external threads?
If you use an impact to remove a stuck bolt from a C-Sert, the L-H external threads prevent the
C-Sert from coming out with the bolt.
Why the “cloverleaf” installer design?
The design functions as a die to chase the threads of any damaged or defective bolt.
In what types of metal can C-Serts be Installed?
In mild steel, high carbon steel, alloy steels (like 4130, etc.), cast iron, aluminum, magnesium, copper, brass, bronze.
Can I install C-Serts in hardened steels?
Yes, but only up to around 34RC.
Can C-Serts be installed in through holes?
Yes. But most applications are in blind holes.
When I install a C-Sert, can I use the same size bolt as before?
Yes. The fastener size remains the same.
Can C-Serts withstand high temperatures?
Yes. They won’t loosen, but they can lose some of their hardness.
What are C-Serts made from?
From S-7 high impact tool steel. Our Mini Thinwalls are made from 8620 gear steel.
When I buy C-Serts, what comes with them?
A hex head installer, cutting fluid, and instructions. And, at your option, a drill bit (for C-Serts up to 1” or 24mm).
Where are C-Serts made?
Los Angeles, California, USA.