SeaKing Stores › M8 A4 stainless hex full nut - EACH M8 A4 stainless hex full nut - EACH £0.20 M8 thread size. A4 stainless steel hexagon full nut. Sold individually; quantity 10 means ten loose nuts. Supplier reference: A4FNM08. Add To Cart Added! M8 thread size. A4 stainless steel hexagon full nut. Sold individually; quantity 10 means ten loose nuts. Supplier reference: A4FNM08.