NB Fasteners

We manufacture and supply a variety of Free Running Type Thread Inserts. Our “HELI-FORM” brand high precision stainless steel screw thread insert is widely used owing to its excellent performance and related tools for permanent protection of threads in any material. It is mainly used for thread protection in critical areas of machines which cannot be changed or repaired frequently. Our Free Running Type Thread Insert saves time and avoids delay in production process. Also, increases long life of the machine. Following are the advantages of these inserts -

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.