Purchase Qty. Reference FOB Price
1,000-9,999 Pieces US$0.10
10,000-49,999 Pieces US$0.01
50,000+ Pieces US$0.001
Product Description
Product Description SEMS screws (or SEM screws) are machine screws with lock washers pre-attached to save users assembly time. They combine two separate parts into one pre-assembled, low cost fastener. With washers under the head, SEM fasteners allow for fast installation, permanence, and easy ...