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View Technical Charts for Screw Thread Inserts
View Charts
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Products - Self-Locking Nuts
 
Helisert Self-Locking Nuts withstand vibration,
heat and eliminate corrosion, even at temperatures upto
4000C.
One or more stainless steel grip coils near the
centre of the thread inserts inside the nut holds the
screw/bolt securely against loosening. They maintain a
strong constant pressure on the external threads.
The thread inserts provides a permanent internal thread.
Fish Nuts : M25 x 3, specially designed for Railway
fishplate bolts.
Benefits
# Applied torque does not have to overcome thread
friction due to imperfect thread form. Almost all torque
is used to stretch the bolt.
# Greater loading for applied torque than ordinary nuts.
# Maintain preload stretch in bolt beyond amplitude of
unload vibrations.
# Insert is flexible and compensates for lead and angle
errors always presents in making threads.
# Load is more evenly distributed over all engaged
threads.
# Can be repeatedly assembled and dis-assembled without
loss of efficiency.
Advantages
# More efficient than locknuts with nylon inserts
against heat etc.
# Extremely close tolerance.
# Increased load-bearing capacity.
# High Tensile stainless steel threads of hardness HRC
43.50
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