Rear axle key size 8x7x60 - code 313Ga
Strength of EL.ZET rear axle materials:
1. Axles marked red/SOFT (M2, FS3, FL3, ZL3, D3) ..... Rm = 350-400 N/mm2
2. Axles marked brown/MEDIUM HARD (M3, FS4, FL4, ZS4, ZL4) ..... Rm = 450-500 N/mm2
3. Axles marked green/HARD (M4, FS6, FL6, ZS6, D6) ..... Rm = 480-550 N/mm2
4. Axles marked white/EXTRA HARD (M5, FS8, FL8, ZS8, ZL8, D8) ..... Rm = min. 650 N/mm2