Helical Coils

Superiority
ArmaCoil Inserts provide positive means for protecting and strengthening all tapped threads.
They are mirror-smooth, reinforced internal threads of cold rolled 18-8 stainless steel, of hardness 43-50Rc, or other specialized material, with hardness far in excess of the usual tapped materials. The outstanding engineering features of ArmaCoil inserts, recognized by the leading aerospace, industrial and military equipment manufacturers, have established their widespread use in these fields.Flexibility
Maximum design flexibility as well as compliance with conventional engineering
practice gives the designer unlimited opportunities to use ArmaCoil Insert assemblies.
Five lengths of insert for each thread size are available; lengths of 1, 1.5, 2, 2.5 and 3 times the nominal thread diameter.Assembled Strength
Of major importance to the designer are the charts showing the Tensile Strength
of ArmaCoil assemblies.
These charts are available in Metric sizes from M2.2 to M24 and Unified sizes from 2-56 to 1.ADVANTAGES
DESIGN FLEXIBILITY, GUARDS AGAINST THREAD WEAR, MAXIMUM CLAMPING TORQUE, MINIMISE WEIGHT & SPACE, BALANCED STRENGTH DISTRIBUTION, REUSABLE LOCKING FEATURE, CORROSION RESISTANCE, MINIMISE TOTAL COST, QUALITY AND RELIABILITY.Free Running
ArmaCoil inserts are manufactured from High Tensile Stainless Steel Wire that has been formed into a diamond section to exacting dimensional standards.Screw Lock
In addition to all the characteristics of the Free Running insert the ArmaCoil
Screw Lock insert has one or more of its intermediate coils deformed polygonally.
This serves to create strong resilient pressure onto the thread flanks of the bolt
as it passes through. This built in Prevailing Torque of the grip coil positively locks the bolt safeguarding against loosening under vibration or impact.