For use in civil aircraft

Steel alloy splined shaft (torque shaft) with straight teeth and involute profile, with: -external toothing in a diametral pitch standard, -17 teeth or more, but not more than 50 teeth, -a diameter of 35 mm or more, but not more than 145 mm, -a length of 200 mm or more, but not more than 1345 mm, -a hardness of 35 HRC or more, but not more than 45 HRC

Stepped shaft made of carbon steel with:  -rolled, involute profiled, splined shaft end, the helix angle of which is at least 0°15,5' but not more than 0° 21,5', -a largest diameter of 16 mm or more, but not more than 18 mm, -a length of 137 mm or more, but not more than 155 mm, -a weight of 0,12 kg or more, but not more than 0,28 kg

Drum shaft for torque transmission, in steel (to SM45C for shaft standard and STS430 for ring standard) with: -a length of 137,8 mm or more but not more than 138,2 mm, -an outer diameter of 23 mm or more but not more than 48,025 mm, -a weight of 1,0245 kg or more but not more than 1,0445 kg, -a hardness of the shaft of 40 or more on the Rockwell C hardness scale (HRC), but not more than 50 HRC, -a ring hardness of 90 or more on the Rockwell B hardness scale (HRB), but not more than 120 HRB, -an external 37-teeth spline with major diameter of 41 mm or more but not more than 48 mm