Button Head Socket Screws: Unbrako ISO 7380

Unbrako Button Head Socket Screws offer a low-profile, refined fastening solution where a smooth dome-shaped head is preferred over the cylindrical head of standard cap screws. Available in metric sizes M3 through M12, these fasteners feature a wide, shallow dome head with a hexagon socket drive that gives a clean finished appearance while maintaining strong clamping force. The button head design distributes bearing pressure over a wider area than a countersunk screw and protrudes less than a standard socket head cap screw — a good compromise between strength and aesthetics. Made from alloy steel with black oxide finish, Unbrako button heads use the same premium metallurgy and heat treatment that define all Unbrako products. Also available in flange button head configuration for increased bearing surface without a separate washer. Shri Narayan Machinery LLP in Noida supplies the complete Unbrako button head range for consumer equipment, enclosures, and light-duty engineering.