Thanks, "Nate". I would've been fine with just "10mm", but it's always good to learn new terminology, acronyms, etc. My question was just me "over thinking" (a terrible affliction I've had for many years..lol). Initially, I thought we were venturing into "A-utomatic T-ransmission F-?" territory...
Still unsure about the "nut" to which you're referring along with the "adjusting screw"?