Monel rivets will be harder to drive and buck than aluminum rivets due to their higher strength and tendency to work harden.Īluminum AD rivets come in these main configurations: universal head (similar to but not exactly the same as round-head), designated as AN470AD or MS20470, and flush or countersink rivets that are shaped to fit in a 100-degree countersunk hole, designated as AN426AD or MS20426. Thus a 1/8-inch Monel rivet that is -inch long will be shown as MS20615-4M4. Sizes are indicated by a suffix such as this: -4M4, where the first 4 is the diameter in 1/32 inch, the M is for Monel, and the last 4 is for the length in 1/16 inch.
Monel universal head rivets carry the designation MS20615. Monel has a melting point of about 2400F, versus aluminum at 1040F. They are preferred for this application because they are fairly fire resistant, and they have a low tendency to corrode when in contact with stainless steel or titanium. These metals will be found almost exclusively in the firewall area of most planes. They can also be used to join titanium parts. Monel rivets have limited use, that being mainly to join stainless steel parts together. Solid rivets come in many different metals and alloys, but the ones most commonly used by Experimental builders are made of aluminum or Monel. Since we covered blind rivets in a previous article, we will focus on solid aircraft rivets in this article. The rivets we are likely to use can be roughly grouped into solid rivets and pull or blind rivets.
There are lots of different types of rivets, but only a relatively few are of interest to amateur airplane builders, so we will keep our focus on those and refer you to AC43.13-1B for more information on the many types of rivets that do not apply to us.
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