tank attach bracket shims question

[Greenley]

Working on page 18-5 of RV-10. Figure 1 shows AN426 rivets for attaching the K1000-08 plate nuts, but the directions do not call for any dimpling or countersinking for these rivets, like they do for the K1100-08 plate nuts. Yes I understand for the screw itself these are different, but what about for the rivets that attached the plate nuts? Is that now part of what is assumed you just do, or am I missing something?
Bill Greenley

 

[CharlieWaffles]

Not so much as assumption as an omission. I remember running into this. Yes, dimple the shim and the rivet ears on the K1000-08.

 

[Greenley]

Thanks, in addition to dimpling the shim it looks like the attach bracket should be countersunk, does that seem right.
Bill Greenley

 

[CharlieWaffles]

You know, now that I think about it, I think this is what I did:

Dimple the Shim
Countersink the attach bracket
DON'T dimple the nutplate.

This is the approach I took as the attach bracket was too thick to dimple.

 

[blahphish]

You know, now that I think about it, I think this is what I did:

Dimple the Shim
Countersink the attach bracket
DON'T dimple the nutplate.

This is the approach I took as the attach bracket was too thick to dimple.

I agree with Charlie - this is what I did too.

 

[Greenley]

That makes sense, and it helps to know I didn't just overlook something.
Bill Greenley

 

[tkoelzer]

NAS 1097 AD3 Rivet Alternate

Just completed these steps last week and countersunk vs dimpled nutplate attach hole using NAS 1097 AD3 rivets (Oops rivets), which worked fine. I prefer this over using the larger head MS426AD3 rivets to retain nutplates anchored to thin material like these shims. See result below:

http://mykitlog.com/users/display_log.php?user=tkoelzer&project=714&category=0&log=146690&row=8