Tractor Supply Super Trac 303 Tractor Hydraulic Fluid has been field tested and suitable as a replacement for the following OEMs...basically every OEM.
Fine print on rear label: 303 Tractor Hydraulic Fluid has NOT been recommended by any OEM for use in equipment later than 1974!!! For equipment built after 1974 requiring 'multi-functional fluid', use Super S Premium.
Front label claims Anti-Wear Properties, Brake Chatter, blah, blah...
Yup, "Field tested and suitable" but then so am I and Johnnie Walker, though neither will do you much good as a gear lubricant. As Nige and others have pointed out "Meets or exceeds" is the phrase you're looking for, prior to the name of your machine's OEM and pertinent specification.
Hey, to all interested parties: it's your machine, run what you want, but TANSTAAFL still applies even though Heinlein is dead.