These Tee Nuts have a spring loaded ball that prevents unwanted movement of the nut in the slot. This allows for inserting nuts in the verticle position as they will not slide from gravity. They are highly desirable to allow for adding tee nuts in a pre-built design.
E-mail: weifeng58@wf-fastener.com
Phone: 0086-13305846890
Website: www.wf-fastener.com/