Which Rivets?

[48_liner]

The part number on one of the sizes was MS20470-5-5. They have "01DC" cast into the head. I probably purchased some exotic, experimental aircraft rivets instead of the plain jane ones.


I did get my bead roller from Eastwood today so I can start putting the bead edge on the end cap panels.

[markdoane]

I found one other instance where a builder from Vans Airforce ran into the same markings from Aircraft Spruce. Back in Dec '05. Don't think he got a clear answer either.

I think it might be some left-overs from some special mfg lot that Aircraft Spruce is trying to get rid of. Don't know why you got the same thing from Aircraft Tools. There must be some backroom connection.

[Aerowood]

I think you left out the alloy number on the part number, it should be MS20470AD5-5. The AD is the alloy number, in this case 2117 Aluminum.

[48_liner]

I called Aircraft Parts yesterday and was told that all their rivets have the cast in numbers. They gave me the number for Guardian Rivet and Fastner in New York. The gentleman there said all their's had the same casting. He was going to check in the back and see if they had an old lot somewhere then give me a call back.

This can't be so difficult. If the part number needs the "AD", am I ordering the wrong ones?

[Aerowood]

Yes this could be causing the problem. I didn't think that you could even order an aircraft rivet without an alloy number. The part number MS20470AD5-5 breaks down as follows: MS=military standard, 20470=head style, AD=alloy, 5=dia. in 32's, -5=lenght in 16th's. The alloy number breaks down as follows from softest to hardest in aluminum alloy numbers, A=1100- plain head, B=5052-plus on head, AD=2117-dimple on head, D=2017-raised dimple on head. DD=2024-dash dash on head, E=7075-circle on head. The early Airstreams Used AD's. My 1971 uses A's but as I am changing alot of skin and I am replacing them with AD's. I don't know what year Airstream switched over to the softer rivets.



























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