They are not tube nuts but are very similar and instead of being round, they are square. Of particular interest to me is the clip that holds the letter "I". It is long, maybe 1/4", narrow and rectangular in shape. I've searched up and down for these clips but have had no luck except for Mike out at the Buick Bonery (he's been great and hasn't charged me a dime btw). My problem is that I need a few more and I can't keep asking the guy to send me clips everytime I find one missing and plus, it'd be nice to have a few spares around. I need these specifically for a '63 Riviera and if anyone can help, I'd really appreciate it.
Group 12.183 GM #7600028 My best guestimate on the part number. It is for the Buick rear compartment letters 63-68 at least.
Local yard has a 63 LeSabre and 66 Riv, email me direct and I can check to see if I can get some clips for you. GStage1@buickperformance.com
