"I have purchase two lots of this product at four week intervals. The first packet was 8mm diaimeter the second lot 1/4" imperial. Both packets are labled 8 x 100mm. Hereby lies the problem! There is also confusion about the diameter in the ScrewFix catalogue / website."
"These may well be made from 8mm rod , but the thread is definately not M8 . I have 2 M8 dies (M8 x 1.0mm and M8 x1.25mm ) Neither of them fit ! So if you want to use a back nut you are going to have a problem as only 1 nut is supplied per eye bolt !"