Anyone recognize these tailcone fasteners?

[RVbySDI]

Originally Posted by Ralph Inkster

Clarification of above process - this applies to fiberglass fairing’s & components only.
If you have a metal to metal cover that you wish to convert, much bigger process involving dimpling, changing nut plates, & probably some painting

Yes, metal may require dimpling. However, there are some situations when a metal piece can be countersunk too. It depends on the thickness of the metal and the diameter of the Tinnerman washer. As for the question asked by the original poster, I replied with the notion he was asking about fiberglass.

[seagull]

Just finished converting all my pan head screws to flathead with Tinnermans.

[seagull]

I saw these in Tony S post. Does anyone recognize the washers used? They are smaller OD than Tinnerman's.

[Bob Y]

The “Flush” washers are what you want.

https://www.wicksaircraft.com/shop/6...chTerm=Washers

I’m planning on replacing my “Tinnerman” washers with these during my next CI. I test fit one a friend had and I found the #8 washer to be too large. The #6 is tight, but gives a better fit in my opinion. I’m going to go with the #6s.

[seagull]

Originally Posted by Bob Y

The “Flush” washers are what you want.

https://www.aircraftspruce.com/catal...ingwashers.php

I’m planning on replacing my “Tinnerman” washers with these during my next CI. I test fit one a friend had and I found the #8 washer to be too large. The #6 is tight, but gives a better fit in my opinion. I’m going to go with the #6s.

I just replaced all mine, tail cone top and bottom #6, wheel pants #6 & #8, cowl top and bottom #8, and spinner #8. I used all Timmerman washers 100 degree. The flush washers you linked to are 82 degrees, I suppose you can change screws but typical is 100 degrees.

[Bob Y]

Sorry, thanks for keeping me honest. I replaced the link. Beware if you order the #8 washers from these guys. Note the hole sizes of the #8 vs. #10 washers. They have them backwards. I blindly ordered their posted #8s and discovered they were too big. I notified them and got a response something like “yea, we know it’s screwed up but we’re not going to give you a refund or return or change the listing”!!! Great customer service.