TUV Test Report for BONOSS Wheel Bolts M15x1.25 (For Mercedes Benz GLE (W167) / GLS (X167) )

Decarburization Test-hardness method: (Test Method: refer to ISO 898-1:2013+Cor-1:2013)

Retempering Test: (Test Method: refer to ISO 898-1:2013+Cor-1:2013)

Hardness Test: (Test Method: ISO 6507-1:2018)

No: 01 220 CHN/T-2001621

Grade:12.9

Material:SCM440