C58 or C-58 may refer to: C-58 (Michigan county highway) C-58 highway (Spain) , an Admirable-class minesweeper of the Mexican Navy Caldwell 58, an open cluster Choriocarcinoma Douglas C-58 Bolo, an American military aircraft , a Fiji-class light cruiser of the Royal Navy JNR Class C58, a Japanese steam locomotive Minimum Age (Sea) Convention (Revised), 1936 of the International Labour Organization Two Knights Defense, a chess opening