
Cross Recessed Raised Contersunk Head Drilling Screws with Tapping Screw Thread
DIN EN ISO 15483 - 2000
①,The function of the drill tip (diameter dp) is specified in ISO 10666. ②,Mateial: a)Case hardening steel or heat treatable steel shall be used b)Hardness: The minimum surface hardness of drilling screws after heat treatment shall be 530 HV 0.3; The core hardness after heat treatment shall be: 320 HV 5 to 400 HV 5 for threads ≤ST4.2, 320 HV 10 to 400 HV 10 for threads > ST4.2; According to ISO 10666 |