Collar nuts, picture in attachment External diameter= 46mm, internal diameter= M22x 1.5, class 10 =very important, height= 26mm, hexagon size 33mm External diameter= 38mm, internal diameter= M18x 1.5, class 10 =very important, height= 23mm, hexagon size 27mm 300 nuts per year of collar nut 46mm and over 1000 nuts per year of collar nut 38 mm