Park-Ohio Holdings Corp. reported “notable” growth in its fastener manufacturing business (RB&W Corp.), contributing to margin expansion.

Engineered specialty fasteners revenue increased 6% to $27.3 million in the second quarter of 2026, driven by higher customer demand for its proprietary products, particularly in Asia. Six-month fastener sales edged up 1.9% to $53.5 million.

RB&W operates in Park-Ohio’s Supply Technologies segment, which reported Q2 sales rose 12% to $209.3 million, while gross profit climbed 18% to $38.8 million and operating income increased 13.5% to $18.5 million.

Segment sales in the first half of 2026 improved 8% to $404.4 million. Gross profit gained 12.7% to $76 million, with operating income up 5.6% to $36 million.