The material can only be 316 of our stainess screw. Application Scope: 1. Apply to tension stone, moving load, fatigue ... l The material can only be 316 of our stainess screw. Application Scope:1. Apply to tension stone, moving load, fatigue ... . Conveyer systems, pipeline bridge and lead rail fixing.7. Baffle board of road, railway, bridge, and other baffle guard fixing. Other ...