Hastings Manufacturing Company (Amex: HMF - news) today announced comparable sales and earnings performance and improved margins in the second quarter ended June 30, 2000. The Hastings, Mich.-based manufacturer of piston rings and other automotive products reported net income of $228,811, or $0.31 per diluted share, on net sales of $9.6 million in the second quarter of 2000, compared with net income of $255,572, or $0.33 per diluted share, on net sales of $9.7 million in the second quarter of 1999.