Hex Head
Cap Screw from Strainsert utilize an exclusive internal
gauging method to indicate bolt tension due to preload
and subsequent service loads with strain gauge accuracy.
Hex Head Cap Screw from Strainsert are the first fasteners
to provide a means for accurate, independent inspection
of an assembled bolt for preload, thereby enhancing the
structural integrity
and reliability of both the bolt and the assembly.
The gauging process consists of the installation of foil
type bonded strain gauges in a small hole drilled along
the longitudinal neutral axis of the bolt. This method
compares favorably in accuracy and stability with the
best external gauge installations, but it is vastly superior
to external installations in mechanical and environmental
ruggedness and miniaturization since the internal strain
gauge installation is self-protecting.
Neither the gauge nor the drilled hole reduce the allowable
bolt load in a Strainsert fastener. The gauge installation
will withstand and accurately indicate the full allowable
load of the highest strength bolts available. Hole depth
is confined to the grip length of the bolt and the hole
diameter is controlled so that the bolt cross-section
through the threads is smaller than the section through
the shank with the gauge hole.
To Measure accurate preload, service load and overload
of bolted assemblies.
For Maximum uniformity, efficiency and reliability
in bolted assemblies.
For Effective research, testing and manufacture
of bolted assemblies.
Hex Head
Cap Screw from Strainsert utilize an exclusive internal
gauging method to indicate bolt tension due to preload
and subsequent service loads with strain gauge accuracy.
