Owfeel Pack of 25pcs M68MM Button Head Hex Socket Cap Screws 304 stainless steel bolts Thread length: 8mm/0.31 inch.; Made from stainless Steel 304. Suitable for machinery and industrial fasteners. Metric thread: M6. Owfeel is registered trademarks,has been filed in the Amazon,and only authorized this exclusive shop to sell,if find out follow-sell or counterfeit,it is infringement,we will pursue legal responsibility.