ALLEN WRENCH; EXTREME SIZE (MM/PLG): 6 MM; LENGTH: NORMAL; DIMENSIONS ACCORDING TO DIN 911 STANDARD; MATERIAL ALLOY STEEL CONTAINING TWO OR MORE OF THE FOLLOWING ALLOYING ELEMENTS (CHROMIUM, NICKEL, MOLYBDENUM, VANADIUM) IN SUFFICIENT QUANTITY TO ENSURE THE HARDNESS SPECIFIED FOR EACH WRENCH OBTAINED BY QUENCHING AND TEMPERING; RECEPTION CONDITIONS THE HARDNESS VALUES INDICATED FOR EACH WRENCH SHALL BE TAKEN; A TIGHTENING TEST MAY BE PERFORMED AS INDICATED; THE KEY SHALL BE INSERTED INTO A TEST HOLE WHOSE DIMENSIONS SHALL HAVE A TOLERANCE OF 0.025 MM WITH RESPECT TO THE KEY SIZES; THE HOLE MATERIAL SHALL HAVE A MINIMUM HARDNESS OF 60 RC FOR SIZES FROM 14 MM AND OVER, AND 45 RC FOR LESSER SIZES; THE DEPTH OF THE HOUSING SHALL BE EQUAL TO THE MAXIMUM MEASUREMENT OF THE SHORT ARM OF THE WRENCH; UNDER THESE CONDITIONS A TORQUE FORCE EQUAL TO 20% OF THE INDICATED FOR EACH WRENCH SHALL BE APPLIED, THE DEVIATION PRODUCED SHALL BE MARKED AND THE FORCE SHALL BE RELEASED; THEN APPLY THE TORQUE INDICATED FOR EACH WRENCH AND THE DEVIATION THAT THIS CAUSED SHOULD NOT EXCEED 10° WITH REFERENCE TO THE MARKED LINE; AFTER THE TEST THE WRENCHES SHOULD NOT SHOW FAULTS, CRACKS OR OTHER DEFECTS; THE PART OF THE WRENCH TO BE INSERTED IN THE TEST SHOULD NOT BE ROUNDED AT ITS ARIES; TORSIONAL MOMENT NOM