STEERING HEAD JOINT RIDE-ON MOWER LAWN MOWER ORIGINAL AL-KO LAWN MOWER TECHNICAL SPECIFICATIONS MODELS T 13-85 HD , T 13-102 HD , T 15-102 HD , T 16-102 , T 17-102 HD , T 18-102 , T 18-102 HD , T 20-102 HD , T 20-102 HDE EXTERNAL THREAD M8 INTERNAL THREAD CODE: 842514239 ORIGINAL CODE: 514239 SR