DALLAS, March 11 /PRNewswire-FirstCall/ -- Keystone Consolidated Industries, Inc. (OTC Bulletin Board: KYCN), reported a net loss of $2.3 million, or $0.18 per diluted share, in the fourth quarter of 2009 as compared to net income of $6.6 million, or $0.55 per diluted share, in the fourth quarter of