The interpretation for structural is that any structure such as a fastened panel is critical to the design loads of an airframe. If fasteners fail and the panel loses its structural load capability, the airframe is compromised. We are not aware of a spring loaded fastener being considered structural mainly because of spring rebound. At best, some claim of semi-structural, we have accomplished. But short of clamp-up capabilities, TurnLock would never claim any MTH or HGR series fasteners as structural.
The forces however, Tensile and Shear strength, are provided.
TurnLock uses 200/300 tensile and shear for MTH series parts. However, TurnLock designed well beyond that. Our lot tests are performed at 400 lbs in both tensile and shear simply because we can test both. I know that we can go to 600 lbs-f before notable strain becomes an issue. Usually there is a 70% reduction with stainless steel parts. we hold the same values in tensile and shear for all our 300 stainless to the steel numbers.
We do the lot testing to prove the integrity of the material more than anything. We hold the same values in tensile and shear for all our 300 stainless to the steel numbers.
