KARMAN K25 Series Vibro-Insulators® Nut Cup Style K230-41

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The K25 Series Nut Cups are ideal for low frequency vibrations.  The mounts offer excellent control against damaging vibration.

The K25 Series Nut Cup Series is also known as dish end plate/plate Mounts, and flex bolt sandwich mounts.

Features and Benefits:

  • Competitive pricing
  • Easy to install with no maintenance
  • Four sizes available K23, K24, K25, and K26
  • Compressive loads ranging from 85 to 560 pounds
  • Available in 40, 50, 60, and 70, Durometer Shore A
  • Available in Neoprene, Natural Rubber, and Nitrile (Buna-N)
  • 2-D PDF prints are available for each mount
  • 2-D DWG, 3-D IGES, and 3-D SolidWorks are available upon request
  • Made in the USA


  • Compaction and construction equipment, all-terrain vehicles, off highway equipment, vibratory rollers, shipping containers, HVAC
Diameter (A) 2 in
Height (B) 1.5 in
Thread Insert 1/2-13
Compression Spring Rate 3070 lb/in
Compression Maximum Recommended Deflection .06 in
Compression Load at Maximum Deflection 185 lb
Shear Spring Rate 320 lb/in
Shear Maximum Recommended Deflection .20 in
Shear Load at Maximum Deflection 65 lb
Durometer 40
Elastomer Natural Rubber
Dimensional CAD Drawing (pdf) PDF
Additional Product Information K23 Deflection Graph 2.jpg

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