DEL2000 is right on. And as far as I was aware, I thought his 600S162-54 (for example) IS the adopted industry standard.
Recently, I reviewed another engineers wall stud design, and he called for 6SW18 studs. Some manufacturers indicated a 2" flange for that stud. I get to the site, and they are installing 1 5/8" flange studs all over the place. Needless to say, I immediately brought this to the attention of the project manager, and after many phone calls and antacids later, the engineer of record certified that he designed 1 5/8" flange studs, and not 2". He was using a different catalog.
SO, if we all adopt the standard as mentioned above, this confusion can be eliminated.