Low Pressure Nylon Expansion Plugs Sizes 0.5″ to 6″

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These superior, versatile, expandable plugs are used to accommodate a wide variety of industrial applications where an airtight seal is required.

COB Advantages:

  • Quality, Lightweight, Durable Nylon 20% lighter than metal.
  • Tough/shatter-proof and easily cleaned and maintained, corrosion resistant.
  • Plaster or cement do not adhere to the plug.
  • Friction-reducing acetyl copolymer thrust washer inserted between plate and wing nut provides for easy expansion.
  • Natural Rubber provides “superior” seal.
  • Larger sizes incorporate strengthening ribs to provide rigidity in use.
  • Silicon, nitrile, and viton seals available.
Solid Stem / SS-0.50″ to 1.50″
Item Number Nominal Size Size Unexpanded Size Expanded Unit Weight
(LBS.)
SS0.50 0.50″ 0.490″ 0.600″ 1/4
SS0.75 0.75″ 0.740″ 0.900″ 1/4
SS1.00 1.00″ 0.975″ 1.200″ 1/4
SS1.25 1.25″ 1.225″ 1.450″ 1/4
SS1.50 1.50″ 1.480″ 1.750″ 1/4
***SS series now available with vented stem
HOLLOW STEM / VS-0.50″ TO 6″
Item Number Nominal Size Size Unexpanded Size Expanded Unit Weight
(LBS.)
VS0.50 0.50″ 0.490″ 0.600″ 1/4
VS0.75 0.75″ 0.740″ 0.900″ 1/4
VS1.00 1.00″ 0.975″ 1.200″ 1/4
VS1.25 1.25″ 1.225″ 1.450″ 1/4
VS1.50 1.50″ 1.420″ 1.930″ 1/4
VS2.00 2.00″ 1.930″ 2.360″ 1/4
VS2.50 2.50″ 2.400″ 2.760″ 1/4
VS3.00 3.00″ 2.870″ 3.310″ 1/3
VS4.00 4.00″ 3.540″ 4.250″ 1/2
VS5.00 5.00″ 4.720″ 5.370″ 1
VS6.00 6.00″ 5.500″ 6.290″ 1