Fastenal Co. (Nasdaq: FAST), Winona, MN, reported sales for May of $383.4 million, a 14.9 percent increase year-over-year. Daily sales increased 9.7 percent to an average of $17.4 million.

During the month, sales to manufacturing customers improved 8.1 percent, while sales to nonresidential construction customers increased 7.2 percent.

Store count was 2,484, compared to 2,632 a year ago. Employee headcount decreased 1.4 percent year-over-year to 19,996.