SEM machine screws with flat washer and spring washer
Descriptions:
See more details of GB9074.8 M4x8 mm SEM screws.
SEM screws are screws with flat washer and spring washer.
GB9074.8 is a Chinese standard model for that kind of SEMS screws.
If customers need JIS standard such as JISB1188 standard, also can be provided.
Valve machines always need this type of screws, QT has VIP customers in domestic market over 17 years with rich experience.
