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Blank Duct Plugs

Kwikie Blank Duct Plugs

Reliable Sealing for Empty Ducts and Innerducts

Formerly Jack Moon Duct Plugs

At Cable Accessories Ltd, we are the distributor for Cal Am Manufacturing, the U.S. producer of Kwikie Blank Duct Plugs, the trusted successor to the Jack Moon® range previously supplied by CommScope.

When CommScope discontinued production of Jack Moon seals, Cable Accessories Ltd partnered with Cal Am to continue offering the same proven designs, quality, and compatibility, ensuring a seamless transition for our customers across telecom, data, and civil projects.

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Whether you need product advice, a custom solution, or just have a quick question — we’re here to help and happy to chat!

Kwikie Blank Duct Plugs are mechanical sealing devices designed to close off empty conduits and innerducts. Manufactured from high-impact plastic with durable, pliable gaskets, they prevent the ingress of water, gas, sediment, and debris into valuable duct networks, while keeping vapours and pressure isolated within their source ducts.

Each plug features a rope-tie anchor integrated into the back-compression plate, allowing pull ropes to be secured and easily accessible for future cable installations.

Many CalAm part numbers are cross-referenced to Jack Moon equivalents, ensuring a direct, drop-in replacement.

Key Features

  • All-plastic, corrosion-proof construction for long-term durability.
  • Water- and air-resistant sealing performance.
  • Quick installation – no tools required.
  • Ideal for manholes, chambers, or building entry points.
  • Reusable design – easy to remove and reinstall.
  • Rope-tie feature for secure pull-rope management.

Multiple styles available – Wing Nut, Loop Nut, and Inside Fit configurations.

Kwikie Blank Duct Plugs are available for conduit sizes from 20 mm up to 200 mm (3/4″ to 8″) in various configurations:

Style Typical Use Conduit I.D. Range (mm) Cross Reference
Wing Nut Type Standard mechanical seal 60.96 – 209.55 Compatible with JM-BLA series
Loop Nut Type For easy pull-rope tie-off 19.46 – 161.93 Compatible with JM-BLA series
Inside Fit Type Compact fit for manholes/building entries 37.08 – 161.93 N/A

All models are Jack Moon certified cross-referenced, making replacement and restocking simple. Please see our ordering guide for a full list of available sizes.

  • Telecom and fibre-optic duct networks
  • Data centres and campus backbone conduits
  • Utilities and local authority infrastructure
  • Building and industrial service entries
  • Civil ducting and sub-ducting networks
  • Repairs, maintenance, and future expansion readiness

With decades of experience in the Irish telecom and infrastructure market, Cable Accessories Ltd offers more than just supply; we provide technical advice, specification support, and local stock availability.

We can assist with:

  • Identifying the correct plug for your duct size and application
  • Providing drawings, samples, and specification sheets for project approvals
  • Offering field-tested recommendations for new and legacy duct systems
  • Immediate stock availability for most popular sizes
  • Local stock in Dublin — ready for immediate dispatch
  • Experienced technical team — help with selection and design
  • Direct replacement for Jack Moon® part numbers
  • Documentation and drawings for project approval
  • Trusted partner to utilities, contractors, and telecom operators

Below are some of the most commonly used sizes and configurations from the Cal Am Kwikie range — all available from Cable Accessories Ltd:

Product Number Duct I.D. (mm)
CM 5120-07 19.46 – 25.91
CM 5120-10 25.25 – 35.31
CM 5120-12 29.36 – 38.35
CM 5120-15 37.08 – 46.48
CM 5120-20 46.58 – 60.60
CM 5120-25L 60.96 – 75.95
CM 5120-30L 74.17 – 87.63
CM 5120-35L 86.61 – 99.06
CM 5120-40L 100.08 – 109.98
CM 5120-50L 123.19 – 133.35
CM 5120-58L 118.75 – 133.35
CM 5120-68L 139.45 – 150.88
CM 5120-60L 152.15 – 161.93
CM 5120-80L 198.37 – 209.55

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