Rated 5 out of 5Â by FastFreddie44 Stronger than you think
I used the 20mm insert nut (type D) in conjunction with 50nn joint connection bolts to attach the sides of a bed I was making, I wanted them to be a strong assemble but able to pull apart should the bed require moving its a large solid wood bed and the design was causing fixing issue I used 5 of these at each corner (3 would have done) into soft wood I drilled a 7:5mm hole but in harder material (like resin or in a knot) I would go to 8mm hole...I did snap the top off one trying to go into a knot ...
They are much stronger than screws alone
2 Jun 2016
Rated 3 out of 5Â by Grunty Good but exercise care
Good solution for strong and repeat assembly/dismantling in wood.
As others have said, the correct size of hole needs to be drilled first. But even so, the head into which the Allen key fits shears easily when screwing these into hardwood.
Once broken, the remnant is fiddly to remove!
1 Mar 2016
Rated 5 out of 5
Â by Coastie Just the job !
An excellent method of fixing into my new work tops ( self fitted) . Work tops were Apollo slab tech solid surface , and needed to be securely fastened, and with an under sink mount I needed the reliability and faith that the sink would be held in place when full of water and washing up. The fixings were screwed into the holes I drilled with then the M6 bolts neatly screwing in holding the brackets. A great fixing for these new style work tops.
3 Feb 2016
Rated 5 out of 5Â by ExLibris A real moneysaver
I needed to repair the weathered hardwood frame of the canopy of a garden seat. It had been manufactured with 13mm insert nuts which had loosened as the damp had got into the end grain. Browsing through the latest Screwfix catalogue - and not even knowing what they were called - I found these 20mm nuts. The perfect solution, they've made a robust repair - and with enough to spare for the next job.
A very satisfied customer.
20 Jun 2015