Tape your bucking bar sides and/or put a piece of poster board against the skin to prevent scratching of the surfaces. If you have the swivel mushroom set on your rivet gun, switch to a fixed head mushroom set since it's not centered on the rivet head. I didn't use mine much, as I preferred the swivel type with the rubber shroud around it for 99.9% of riveting. But when you need it that 0.1% of the time, it'll do the trick.
Depending on the function of the nutplate and fastener, you may be able to get away with "dead soft" rivets, if setting with a wrench.
I used "dead soft" on nutplates around fiberglass, at the recommendation of my tech counsellor; think wingtip light lenses, etc.
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John Tierney
Vonore, TN
RV-7A - N777JT Flying
I remember no good tool except the cubic$ pneumatic alligator squeezer. My avery worked kinda close to a wall/floor but very limited.
For nut plates the 3/32" CS pull rivets and a wedge under the anvil should work.
The Knipex sounds like a winner. I would use NAS rivets if solid as they are a massive time saver. Section 5 in the Vans instructions talks about them.
I used Knipex pliers to set most of my nut plates. Smooth jaws and parralel action make them a mini squeezer for flush rivets, esp in tight places like those.
What size do you have. I see 4-16 inch options.
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RV-7A builder
A320 Capt at some airline
T-37/T-38/KC-135
C-177/172
Piper Warrior
2023 donator
Emp complete
Wings complete
Working on fuselage