Sems screws are machine screws that can have one or more flat or lock washer under the head already assembled.
Contact: Sean Chow(Vice President)
Phone: +86 189 292 746 30
Tel: 0086 769 8231 1106
Email: sales@precision-screw.com
Add: Humin Industrial Zone, Changping, Dongguan, Guangdong, China.
Eastern Precision Fastener Corp.