Trapezoidal O-ring shapes up to a more secure, leak-free performance.

Last week, our San Leandro ParkerStore became the final one of our stores to receive inventory of BrakeQuip automotive brake line products. This means that no matter which Hose & Fittings, Etc. location you visit, you will be able to get your brake lines replaced for a fraction of what you would pay at a dealer - and you can have your parts the same day.

Protect the performance and value of critical components with Parker screen fitting elements

Particles can find their way into a system (even a properly filtrated one) during installation, maintenance, failure of components or by other means. Critical and valuable components need one last line of defense against potential damage from contamination.
That's where Parker screen fittings provide a vital safeguard. Implemented in addition to your filtration system, they provide "protection at the connection," retaining particle sizes from 480 to 65 microns, depending on the screen rating.

Identifying the thread of a fitting is an important step to identify a Parker (or any other manufacturer's) fitting part number. However, the information below is general in nature and applies to any threads in any situation, such as threads on bolts, ports or machined parts.

Parker Monoblok^TM fittings are machined as a complete part (from one piece of metal). This method of manufacturing eliminates all braze joints and potential leak paths.

White corrosion, caused by zinc oxide formation, occurs first during normal use. Other than appearance, fittings showing signs of white corrosion still have adequate protection. However, the formation of iron oxide (red rust), signals oxidation and deterioration of the base metal, which may require replacement of the fitting.

I found the article below at Newz For Me.

Here is a new solution for keeping your 2HD and 3HD Parker cylinders working longer in environments containing abrasive particulates: Parker's new Crown Wiper.