Tentec Nuts replace existing hexagon nuts to give a rapid, accurate and
uniform Bolt load to any bolted joint. The Tentec Nut offers a method of
bolt tensioning multi-bolt applications which greatly improves the integrity
of the joint. The speed in which joints can be tensioned and detensioned
shows an extraordinary time saving over conventional detachable bolt
tensioning systems. An existing Oil company user of Tentec Nuts has
recently reported a massive time saving of 1750% over their old bolt
Hydraulic pressure is applied simultaneously to each Tentec
Nut. All frictional factors connected with conventional bolt
tightening methods are alleviated since Tentec Nuts apply
a direct axial force to the bolt which generates a bolt elongation.
This elongation/tension is permanently retained by
means of the load retaining collar.
Tentec Nuts have been designed to be as compact as possible,
in order to allow adjacent fitment on as many applications
as possible. In most cases they are designed to
produce a residual bolt stress of 45000 lbs/In2 (310N/mm2)
which is more than adequate for most bolted joint applications.
As pressure is applied to the Tentec Nuts not only does
the bolt elongate but also joint compression occurs.
Since many applications incorporate some form of gasket,
this joint compression can be substantial, in order to withstand
this joint compression all Tentec Nuts are capable of
considerable piston movement. This allows the Tentec Nuts,
in most cases, the ability to tension a complete joint in only
one pressurisation sequence, this can result in extremely
high time savings.