Yes, but they are cheap, and two legs will fit the Easton 340 tube, and the third fits Easton 312. And the 312 leg can be used as is, or drilled out for 340, the same ID as the others. Quite a bit of versatility for a little bit of nylon plastic, and it should hold my pack frame spars together just peachy.
Don't ask me why they would make one half of the top T bar with one ID, and the other half with another ID. Strange, but for me, useful.
Sorry if I sent you on a wild goose chase. Maybe that's why they call it 'Home Desperate.' (Almost the same stuff is at Lowes) In any event, they also have the black PEX tees with 312 ID that look pretty sturdy. Not enough types to play with, but adequate, I'm hoping, to hold a pack frame together against all the stresses of packing. Certainly better than the kite tees for this purpose, but maybe you knew that, since you switched away from them also.
Should I need something more specialized, or perhaps stronger, will definitely order from M-C as you suggest. Thank you.
BTW, in looking at dozens of types, did you ever run across a T with an angled post, like kite tees ('leading edge connectors') come with? As earlier noted, the kite tees are not very sturdy, unless you use the thickest heavy ones, and even then not so much. I am looking for something in 60 degrees that could be trusted to hold a spar to which shoulder or lift straps are attached. Kites and Fun Things had a photo of some heavy 60 degree Tees, but when I ordered them, they sent and had only regular right-angled ones. Just a mistake, but the existence of the photo suggests that heavy 60 degree ones do exist. I can make the equivalent of Tees out of sewn twill or grosgrain tape, but an actual fitting will look a heck of a lot nicer; but only if it will hold the blankety-blank spar to the frame.
Into the backcountry we go!
P.S. (Later that evening): Checked out the McMaster-Carr site again and found some Y-fittings that with a little modication, may provide a 60 degree connection. Won't know until I obtain and can examine them. Thanks again, Daryl. Great suggestion.