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Tamper Evident Caps and Plugs
Hyperkinetics Corporation has a full line of CGA Caps and Plugs that cannot be removed without breaking the seal.  This eliminates mix-ups between full and empty cylinders.  It is also a means to satisfy the FDA requirement that food grade products have a tamper evident seal.
Tamper Evident Cap With 8 Inch Strap

This cap will fit multiple CGA connections either as a cap, or turn it over and use it as a plug.  It has an eight inch strap.

Fits CGA 580/590/320/326/346/350

Part Number

033-521 - Green
033-356 - Blue
033-504 - Natural (Clear)
033-505 - Red
Tamper Evident Cap With 4 Inch Strap

This cap will fit multiple CGA connections either as a cap, or turn it over and use it as a plug.  It has an four inch strap.

Fits CGA 296/500/580/590

Part Number

​033-521 - Green
033-522 - Black
033-523 - Brown
033-524 - Red
Tamper Evident Cap With 11 Inch Strap

This cap will fit multiple CGA connections either as a cap, or turn it over and use it as a plug.  It has an eleven inch strap.

Fits CGA 580/590/320/326/346/350

Part Number

033-515 - Red

For CGA 540 Oxygen

033-517 - Natural
Threaded Loop Cap/Plug

This cap will fit multiple CGA connections either as a cap, or turn it over and use it as a plug.

Fits CGA 320/326/346/350

Part Number

033-448 - Gray
Tamper Evident Cap With 8 Inch Strap

This cap is made for a CGA 540 Oxygen Valve.  It has a longer strap so it can be used on liquid cylinders.

Fits CGA 540

Part Number

033-355 - Green
Tamper Evident Cap With 11 Inch Strap

This cap is made for a CGA 580 Valve.  It has a longer strap so it can be used on liquid cylinders.

Fits CGA 580

Part Number

033-427 - Blue
033-517 - Natural
Tamper Evident Cap With Strap

This cap is made for a CGA 510 Acetylene Valve and POL Propane Valve.

Fits CGA 510

Part Number

033-518 - Yellow
033-528 - Blue
033-524 - Red