NIB – Crouse Hinds – UNY805SA – 3″ Copper-Free Aluminum Union For Hazardous The Eaton Crouse-Hinds series UNY union is designed for rigid/IMC conduit types in hazardous/classified locations. It is made of copper-free aluminum and has a nominal trade size of 3". Material: Copper-free aluminum. byJuly 3, 2026