There a new product to me un the UK that is being stocked by one of my suppliers. They look worth getting a few 6mm ones ..mild steel, stainless steel to trial.I've seen those before.
I wonder if the picture has been 'flopped'?
Seem to remember the 'ramps' should act to increase axial pressure on turning out (R H threads).
1 time deal thoughA decent cross thread trumps all other locking device
Thats the use I was thinking of them for...Allen socket screws in particular that are not the sort used on Stihl and some other saws.Seems they are designed for bolts that thread into Not a nut and bolt system. I'd say to a certain degree they will work Based on the nuts I've seen made that way
These Heico-Lock ones start at ..6mm -1/4 in hole. They also make a captive nut/washer unit for studs Criss.I use a lot of nordlocks. I've seen the bolt break before it will loosen when you're taking it apart. They're great for some applications but they don't make anything under 1/2 or 3/8'', I just forget