Industrial conglomerate 3M Co. (NYSE: MMM – $202.03) said its board boosted its quarterly dividend by 6% to $1.44 per share from $1.36. The annual payout based on the new dividend rate will be $5.76 per share, yielding about 2.8%. The quarterly dividend is payable March 12 to shareholders registered on Feb. 15. 3M has increased its dividend for 61 consecutive years and paid dividends to its shareholders without interruption for more than 100 years. Shares of 3M are a viable candidate for conservative accounts.