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Just inherited a greenhouse and have started to put it together. I have discovered I am missing a very specific kind of nut. Where the sides and ends of the greenhouse meet each metal face has a countersunk hole drilled into on either piece. From one side you insert a machine bolt with a countersunk head, this screws into a counter sunk bolt/wedge shape threaded washer. The part I am missing is the counter sunk bolt/wedge shape counter sunk washer, I only have one, its M6 in size.
The part literally looks like a thick steel washer with tapered edges, however the hole is threaded. I have trawled greenhouse websites with no luck, any thoughts on where I might get my hands on such a thing? Just need another 7.
Not quite right;
https://www.namrick.co.uk/acatalog/Home_Steel_Flat_Head_Rivet_Nuts__BZP__183.html
Maybe worth giving them a call.
A picture would paint a 1000 words - or are all the nuts missing?
Would a 'wedge nut' be what you're looking for? Or a 'half moon nut'?
Do you mean a t-nut, like used for joining aluminium extrusion together?
http://www.aluminium-profile.co.uk/acatalog/M6-T-Nut--10pk--KJN501753.html
Inadvertent thank you to all of the above, whilst googling your suggestions I managed to stumble across an image of what I need.
A cone dress nut.
Just need to hunt down a UK supplier, should be easy now I at least know what they are called.