This document, in conjunction with EN 14399-1 and EN 14399-2, specifies the requirements for direct force indicators and H-side washers and HB-head washers as part of high-strength hardware for metal fasteners, and for pre-tensioned bolted joints are suitable. These direct force indicators are used as part of high-strength fittings for screw joints in metal construction of systems HR or HV according to EN 14399-3, EN 14399-4, EN 14399-7 or EN 14399-8 with thread sizes M12 up to and including M36 and strength classes 8.8 / 8 or 8.8 / 10 and 10.9 / 10. This document, together with general dimensions, tolerances, materials and functional properties, specifies the two strength classes H8 and H10 for direct force indicators. The fittings for threaded joints according to this document have been designed to allow pre-stressing to at least 0.7 ful × As1 according to EN 1993-1-8 (Eurocode 3), and to have their ductility primarily by plastic strain the screw in the system HR according to EN 14399-3 or EN 14399-7 or by plastic deformation of the screwed threads in the system HV according to EN 14399-4 or EN 14399-8. Fittings for threaded connections according to this document may contain washers according to EN 14399-6 or EN 14399-5 (only under the nut). and that they achieve their ductility primarily by plastic expansion of the screw in the HR system according to EN 14399-3 or EN 14399-7 or by plastic deformation of the screwed-in threads in the system HV according to EN 14399-4 or EN 14399-8. Fittings for threaded connections according to this document may contain washers according to EN 14399-6 or EN 14399-5 (only under the nut). and that they achieve their ductility primarily by plastic expansion of the screw in the HR system according to EN 14399-3 or EN 14399-7 or by plastic deformation of the screwed-in threads in the system HV according to EN 14399-4 or EN 14399-8. Fittings for threaded connections according to this document may contain washers according to EN 14399-6 or EN 14399-5 (only under the nut).