Crouse Hinds UNY105 Conduit Union. EATON Crouse-Hinds Conduit Union, Dust-Ignitionproof MNPT, Series: UNY, 1/2 in, For Use With: Rigid Conduit, Steel, Electro-Galvanized, 1-1/2 in Dia x 2-3/8 in L. Additional Description: CRHD-UNY105 1/2 NPT MALE UNY UNION. Catalog Description: Eaton Crouse-Hinds series UNY union, Rigid/IMC, Male, Steel, Group B rated, 1/2.