800-431-1311

Cast Aluminum Expansion Plugs

From 1½" to 36" "Light, Tough and Available"


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

COB Pipe Plugs Advantages:

  • Lightweight, easy to handle - up to 70% lighter than similar steel plugs.
  • Durable cast aluminum - heavy duty, non-corrosive and maintenance-free; with natural rubber.
  • Fill or Vent - threaded pipe stem has removable cap.
  • Simple to install and work with - wing nut easily expands rubber seal.
  • Special sizes are available to increase expansion plugs range.

Note: Expansion plugs are less effective at higher limits of expansion than in the mid range. Let us help you by supplying the proper sizes for your requirements.


ALUMINUM Pipe Plugs/ AP1.5" TO 36"
Item
Number
Nominal
Size
Size
Unexpanded
Size
Expanded
Stem 
Diameter
Unit
Weight

(LBS.)
AP01.50 1.50" 1.456" 1.889" 0.50" .50
AP02.00 2.00" 1.889" 2.440" 0.50" .50
AP02.50 2.50" 2.440" 2.775" 0.50" .50
AP03.00 3.00" 2.795" 3.425" 0.50" .75
AP03.50 3.50" 3.503" 3.700" 0.50" 1
AP04.00 4.00" 3.779" 4.133" 0.50" 1
AP04.50 4.50" 4.215" 4.724" 0.50" 1
AP05.00 5.00" 4.842" 5.393" 0.50" 1.5
AP06.00 6.00" 5.900" 6.550" 0.50" 1.5
AP07.00 7.00" 6.550" 7.300" 1.00" 3.2
AP08.00 8.00" 7.700" 8.550" 1.00" 3.4
AP09.00 9.00" 8.200" 9.100" 1.00" 3.9
AP10.00 10.00" 9.200" 10.250" 1.00" 4.5
AP11.00 11.00" 10.300" 11.200" 1.00" 4.9
AP12.00 12.00" 11.350" 12.450" 1.00" 6.7
AP14.00 14.00" 13.800" 15.100" 1.00" 11
AP15.00 15.00" 14.350" 15.800" 1.00" 11.3
AP16.00 16.00" 15.600" 17.00" 1.00" 13.8
AP18.00 18.00" 17.450" 19.250" 1.00" 17
AP20.00 20.00" 19.150" 20.650" 2.00" 28
AP21.00 21.00" 20.650" 22.100" 2.00" 30
AP24.00 24.00" 23.550" 25.500" 2.00" 33
AP27.00 27.00" 26.250" 27.700" 2.00" 44
AP30.00 30.00" 29.250" 31.000" 2.00" 60
AP32.00 32.00" 31.500" 32.500" 2.00" 86
AP36.00 36.00" 34.500" 36.800" 2.00" 96





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