An engineered high temperature resistant steelLockNut Double Image

  • Excellent high temperature stability
  • Very oxidation and carburization resistant to 2100°F
  • Good resistance to thermal shock and quenching
  • Alloy 330 lock nut features and benefits

Alloy 330 lock nuts are specifically designed for high temperature furnace applications. Alloy 330 nuts unique combination of properties allow 330 nuts to handle thermal shock from quenching, be oxidation and carburization resistant as well as handle thermal cycling well.  As a result, alloy 330 lock nuts are found in high temperature applications like vacuum furnaces, heat treating and brazing applications. 

Resources: Alloy 330 Torque Specs

 


Alloy 330 Locknut Features and Beneifts

A alloy 330 locknut resists loosening from vibrations and torque. One of the most common styles is a prevailing torque locknut. This kind of alloy 330 locknut has a prevailing torque feature which deforms elastically, preventing it from freely spinning like a standard nut.

The two most common and reliable forms of prevailing torque locknuts are the flexloc style and the polymer insert lock nut. A alloy 330 flexloc nut is all-metal in composition with a segmented collar that creates six “locking fingers,” that act as a spring. Alloy 330 polymer insert lock nuts are often referred to as nylon insert locknuts, although various high performance polymers can be used for the screw threads to “bite into.” Both flexlock and polymer insert locknuts are available in both hexagonal and 12 point configurations.

 All Metal Flexloc Lock Nut          Flexloc Lock Nut  Polymer/Nylon Insert Lock Nut        Insert Lock Nut
  • Can be used at high temperatures
  • Distributes load evenly due to the fact that it is manufactured as one solid piece.
  • Is THE most reliable all-metal self-locking nut.
  • As it is all metal, it is best for high temperature or corrosive applications
  • One of the only all-metal lock nuts that is certified to 15 cycles of prevailing torque – which is military standard.
  • Overall the most reliable locknut, with the only limitation of application temperature
  • Best for low temp applications, typically less than 350°F
  • Various polymers inserts available (Nylon, Vespel, PVDF, etc.) for higher temp. or corrosive applications.
  • Excellent reusability – can reliably be re-used 15 times
  • Eliminates galling and cold-welding common with exotic alloys

Other all metal lock nuts available include the alloy 330 stover and elliptical styles. Though these styles are often a cheaper initial cost, they are less reliable than the flexloc style. As these styles delivering less prevailing torque cycles and often result in more failures, the flexloc style is a better investment for both reliability and cost savings.

 


330 Tensile Curve

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