E-Z Clip Series Fitting, 5/8-18 Male Insert O-Ring, -06 Hose, Straight

The key callouts match what you listed. It is a straight E-Z Clip Series male insert O-ring fitting with a 5/8-18 UNF male end, and it is made for -06 hose size.

Correct, this fitting is part of the Danfoss Power Solutions E-Z Clip System, designed to eliminate the need for crimping, which also means no leaking crimps.

You'll need a few things on hand before assembly. The fitting itself includes the nipple assembly, but you'll also need two appropriately sized clips and the cage, the GH134 Multi-Refrigerant hose cut to length, refrigerant or A/C compressor oil compatible with your system, FT1357 Clip Closing Pliers, and a guillotine blade cutter like the FT1356 or something equivalent that gives you a clean square cut. One thing worth knowing upfront: the two black o-rings on the nipple assembly are a specific compound and size and should not be removed or replaced. Just leave those alone.