SJ JamNut Tensioners

Superbolt sj style mechanical tensioners used when limited headroom and thread engagement are required.
Superbolt Jamnuts are used for applications where limited headroom and/or limited thread engagement are required.  Two (2) Jamnut styles are ofered.  The standard SJ style and the SJX Style. By using a moly based lubricant the SJX Style can generate a much greater clamping force than the SJ Style. On request jamnuts are available with Superbolt’s® proprietary captive set screws.

Selection Guide:

  • Standard Dimension range: 3/4" - 6" (M20-M160)
  • Specials avaiable for sizes over 6" (M160)
  • Approx. bolt stress depending on size: 450 to 700 N/mm2 (60 to 100 ksi)
  • Temperature range: 0 to 500ºF (-10 to 250ºC)
  • Surface treatment: optional