NB Fasteners

We have expertise in manufacturing of Screw Lock Type Thread Insert. Our company supplies exclusive, resilient Internal Locking Threads that grips the bolt and prevents it from loosening under vibration or impact. Locking action is achieved by one or more of the coils of the insert having a series of straight segments flex outward creating pressure on the bolt. This pressure is exerted between the flanks of the bolt thread thus utilizing the maximum contact area and minimizing the unit pressure. It permits frequent removal and reassembly of the bolt without applicable loss of gripping torque. Mentioned below are the advantages of our Screw Lock Type Thread Insert -

Stronger Assemblies:
The inherent flexibility of the inserts provides more balanced distribution of dynamic and static loads throughout the length of thread engagement. This flexibility also compensates for the variation of load and angle error, because each coil of the inserts carries its share of load.

No thread Wear
Thread life is increased considerably even after repeated assembly and dissasembly, because hardness and surface finish practically eliminates erosion of the thread form due to friction.

Corrossion Resistance
Because of superior corrosion resistance of 18/8 stainless steel, it minimizes galvanic action within the threaded assembly under normal environmental condition.

Design Flexibility
Bolt tensil strength can be balanced against parent material, because there is no staking, locking, swaging, or keying in place – the outward spring like action of the insert holds it in place.

Eliminate Stress
Virtually no stress is introduced into the parent material, because there is no staking, locking, swaging or keying in place – the outward spring like action of the insert holds it in place.

Minimize Space and Weight
HELI-FORM inserts allow use of smaller boses, flanges, and fasteners than any other insert. HELI-FORM Inserts can generally be incorporated in existing designs, where no provision has been made for an insert, without increasing boss size. Weight saving is unmatched – an important design feature for many products, particularly AIRBORNE EQUIPMENTS.

True Clamping Torque
Maximum clamping action and bolt tension are assuired with maximum wrench torque, because of the mirror smooth surface finish of HELI-FORM Inserts.

Wide Temperature Range
HELI-FORM stainless steel inserts can be used in temperature ranging from 320°F to +800°F.