In the pro wrestling story A Ring Of Their Own, Ivory and Molly Holly are portrayed like this. Ivory is the one who convinced Molly to finally come out of retirement and wrestle again. When Molly won the FWF Championship, the first thing she did was hug Ivory.
In the Star Trek fanfic Heroes, Surak compares Kirk and Spock's relationship to the "warrior bond-brothers" he observed in his own day.
In Empath: The Luckiest Smurf, Empath Smurf and Polaris Psyche are considered this, although Polaris is more asexual than heterosexual.
The first ten chapters of Sugar Rush Stories seem to exist specifically to make sure everyone is involved in this trope.
Alone On The Water uses this trope by name when talking about how difficult it is to define Sherlock and John's relationship. John remembers that Sherlock was amused when Harry referred to them as this.