Designed specifically for plugging copper tubing and components in the HVAC and refrigeration industries, StockCap’s Rubber Seal Plugs feature a self-sealing material that allows for the injection of gas that keeps tubes clean and dry during shipment and storage.

Key Features

  • Self-sealing
  • Tapered end for easy insertion
  • Designed for use plugging copper Tubing (ACR, Oxy, L, K, M, DWV, Medical)
  • Ideal for plugging compressors, dryers and filters
  • Non-staining

21 Sizes

StockCap’s line of 21 sizes of rubber seal plugs includes most standard sized copper tubing dimensions from a quarter inch to over 2.25 inches.

Color & Material Specs

Manufactured using a special blend of  black EPDM rubber that reseals after gases are inserted through a needle.

Rubber seal plugs diagram

Rubber Seal Plugs

Plug Diameter “A” (in)Flange Diameter “B” (in)Plug Length “C” (in)
0.2500.3500.375
0.3130.4130.438
0.3650.4650.438
0.3750.4750.438
0.4000.5000.438
0.4380.5380.438
0.4700.5700.438
0.4800.5800.438
0.5000.6000.438
0.5620.6620.438
0.6160.7160.500
0.7030.8030.500
0.7500.8500.500
0.8280.9280.500
0.8300.9300.500
0.9381.0380.625
0.9801.0800.625
1.1251.2550.750
1.3091.5290.750
1.5491.7890.750
2.0202.3000.750