M8-1.25 x 22mm ISO 7380 Hex Drive Class 10.9 Black Oxide or Plain Finish Alloy Steel Button Socket Cap Screw / PART NAME ASSIGNED BY CONTROLLING AGENCY: PLAIN BUTTON SOCKET CAP SCREW SPECIAL FEATURES: BUTTON HEAD SOCKET CAP SCREWS ARE DESIGNED FOR LIGHT DUTY APPLICATIONS SUCH AS SECURING GUARDS, COVERS, AND ORNAMENTAL FIXTURES. BUTTON HEADS PRESENT A PLEASING APPEARANCE TO AN ASSEMBLY. ISO 898 CLASS 10.9. PLAIN FINISH, OR BARE METAL, MAY OR MAY NOT HAVE A COATING OF LIGHT OIL TO RESIST CORROSION.