Hi Slingerfan!I just looked through quite a few Rogers catalogs and each one refers to this part as the "collet nose". I was hoping to find one that showed it as a "nut" but came up empty.First two pictures are from the 1964 catalog. The third picture is from the 1970 Accessories catalog, which also gave this a new part number!-Mark
You are correct Mark, Rodgers does call it the "collet nose". Industry standard is "collet nut" which seems to be more descriptive and less ambiguous, especially for those who understand fasteners like yourself. Both the collet and collet nut could be said to have a 'nose'. While attempting to make things more clear, I'm afraid I've just muddied the waters (LOL).