Fastenal, the distributor of industrial and construction supplies said March quarter revenues rose 20% to $1.7 billion and earnings rose 28% to $269 million from a year ago. Earnings per share increased 28% to 47 cents from 37 cents. Revenues through electronic interface increased 55.6% and comprised 16% of total sales in the period. The wholesaler added a record 106 new onsite locations.