Reply To: This might be a stupid question but…….

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AAS510_IRL
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“Micbro”If I use an M5 heli coil kit to fit a rail to my bobcat, will an M5 bolt fit the thread? I’m a complete novice at this kind of thing and want to get it right first time.


Yes.
You will need to predrill & tap using the supplied M6 tap from the helicoil kit before inserting the M5 helicoil.
Into Aluminium (which I assume the Bbobcat is) predrill 5.2mm diameter x 12.3mm deep inorder to achieve 1d thread depth ie 5mm deep thread.
Then use the M6 supplied tap.
The thread pitch of the helicoil will be M5 x 0.8. You will not get an M5 x 0.5 pitch helicoil. Typically only start at M8 and above.