MIL-F-68F, MILITARY SPECIFICATION: FANS, CIRCULATING, BRACKET, NONOSCILIATING NAVAL SHIPBOARD (20 FEB 1975) [S/S BY MIL-DTL-68G]

MIL-F-68F, MILITARY SPECIFICATION: FANS, CIRCULATING, BRACKET, NONOSCILIATING NAVAL SHIPBOARD (20 FEB 1975) [S/S BY MIL-DTL-68G]., This specification covers nonoscillating, class high-impact (HI) shock-proof, bracket fans for use on Naval surface ships and submarines.