Internal teeth
lock into the bolt to prevent backoff
•
Helps prevent damage
to the surface area
SEMS – Conical
•
Doesn’t disturb
the surface area
•
Adds spring tension
to the joint
•
Distributes load
over a wider area
SEMS – SQUARE
CONE®
This unique Sems fastener features an integral,
free-spinning, Square Cone washer.With two distinct
configurations, this dual action spring washer
has two separate load deflection rates. The configurations
act in unison to provide a reliable low-torque,
controlled-tension fastener. The Square Cone
Sems assembly provides a higher retained clamp
load and improved compensation for thermal cycling
and vibration. This fastener is capable of accepting
a high tension load while maintaining a live
spring action and generates a constant load,
even with variations in installation torques.
By increasing the acceptable driving torque range,
it enhances flexibility in component design.
The Square Cone washer's long deflection
period and two-stage loading contribute to
better control during installation, improve
tool bit life and reduce operator fatigue.
Load is directed toward the outer diameter
of the washer, making the fastener ideal
for clamping fragile materials and for spanning
large clearance holes.
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