Financial Performance - Second quarter net sales increased by 8.6%, primarily driven by improved customer contract signings over the past six quarters[6] - Earnings per share (EPS) for the second quarter improved 12.7% to $0.29, compared to $0.25 in the second quarter of the previous year[12] - The operating margin improved to 21.0% in the second quarter, up from 20.2% in the second quarter of the previous year[12] - Gross profit margin increased to 45.3% from 45.1% in the second quarter of the previous year, reflecting favorable price/cost dynamics and improved fastener sales margins[28] - Operating cash flow (OCF) for the second quarter was $278.6 million, representing 84.4% of net income[31] Customer Site Performance - The number of customer sites with sales over $10,000 per month grew by 6.7%, led by Onsite-like locations which increased by 12.4%[6] - Sites with sales over $10,000 per month accounted for 81.4% of net sales in the second quarter, up from 79.2% in the second quarter of the previous year[6] - Total manufacturing customer sites were 43,138 with sales of $1,575.4 million, while total non-manufacturing customer sites were 58,302 with sales of $504.9 million[7] Digital Footprint and Technology - Daily sales through eBusiness rose 13.5% in the second quarter[18] - Activity through the company's FMI (Fastenal Managed Inventory) technology platform represented 44.1% of sales in the second quarter, compared to 41.8% and 39.8% in the second quarter of the previous year and the year before, respectively[17] - Sales through the digital footprint (FMI technology plus non-FMI-related eBusiness) accounted for 61.0% of total sales in the second quarter, versus 59.4% and 55.3% in the second quarter of the previous year and the year before, respectively[18]