FYI: the DD and E rivets are both aluminum alloy and not brass. The DDs are 2024 "icebox" rivets and the Es are 7050 and can be cold driven.They don't cross reference the mil spec number, but????
Thanks!Check with Hanson Rivet in Socal. They manufacture a ton of speciality rivets.
https://www.hansonrivet.com/
They don't cross reference the mil spec number, but???? http://www.matcomfg.com/BRASSRIVET-idv-3556-35.html