M12 x 1.5mm pitch, tapered.
One set is nice and shiny and hardly used (x16)
Another set is same design but a bit weathered (x16)
These two sets have closed ends so if your studs are very long (like mine - to allow for spacers) they might not fit.
Final set are aluminium and are anodised black, they are about 40mm long (longer than the other ones) and have open ends. I bought 2 different
"lengths" of these and the shorter ones were long enough. I think I have 20 of these.
Shiny set is £12 plus £8 post.
Weathered set is £7 plus £8 post.
Ally sets are £15 plus £5 post (cost about £25 to £30).
Or near offer.
Shiny set:
Rescued attachment 16x m12x1.5 nuts - shiny.jpg
Weathered set
Rescued attachment 16x m12x1.5 nuts.jpg
Ally ones are like this but about 10mm longer.
Rescued attachment ally nuts.jpg
2nd dibs on the ally ones if sale falls through
Ally set provisionally sold.