screws Model: B, BS, CSS, CSOS, S, SS, CLS, KFSE, KFB3, ... -precision automatic lathes, cam walking effortAuxiliary processing: high precision automatic tapping machines, ultrasonic cleaning machines, vibration grinding machineInvolving areas: desktop computers ... HB150; less than HRB70 less than HB125. . . S0S-M3-12 screws