If the thread is knackered, you can't normally rethread it using a 3.5 tap. If the thread is gone, then you could try a new bolt, it might hold it. Otherwise the proper way of doing it is to get a new backbox. Ofcourse you can just use threadlock and other things to budge it, but next time you take it off it will be the same story again.
Screws for screwing socket cover to back box
- Thread starter Fallout
- Start date
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Of course you can. The method has already been explained in this thread.
It's a very rare occasion that you can't rethread a lug. It has to be really stripped to not be able to repair it
When the lug has been totally gone, I've drilled a 3mm hole in the KO directly behind the lug and threaded that to 3.5.
If you read the small print for them things above you have to bore the lug out to 5mm.
Its a shame no one makes these in 3.5, im tempted to buy some 4mm ones squashing a tad and rethreading
Its a shame no one makes these in 3.5, im tempted to buy some 4mm ones squashing a tad and rethreading
If they did you would be driven to distraction by them getting out of alignment and/or falling off the lugs.
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Be fair - they are super grommets.
But sadly the website has been designed by someone who has such contempt for customers that you can't click on anything to find out just what is super about them.
Already got them, or just not bothered?
Instead you could try using this type of 2-part Epoxy Putty- https://www.amazon.co.uk/d/Epoxies/Cargo-QuikSteel-Steel-Reinforced-Putty-Metal-Repair/B005O0366Q
(About the same price but can be used for many lugs - and for other jobs.)
Kneeds like Plasticine. Sets hard within 15 minutes.
Cover the Lug with a blob of this, pierce through the hole before it sets (to save drilling), tap after it has set.
(You may even be able to use a screw as a pseudo tap before the resin has fully set, if you file the appropriate slots and taper the screw.)
Super grommets are actually BRILLIANT. They have an angled flange on one side, and then a larger lip on the other. So they push in incredibly easily, and then don't push out as you pull cables through (larger flange has to go on the side the cable is coming from)
I literally refuse standard grommets in the wholesalers now they're much easier to use
Presumably though you don't pay £30 for a bag of 100....
Well no. They're not that good. I suspect it's more like the cost in the link above, but can't say as I've ever asked. The most expensive a normal grommet gets at B&Q is 20p! I suspect if they moved up to super grommets they'd be close.
The way they fit into a hole (and the orientation wrt cable entry) is just like those Masterseal conduit entry adapters.
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