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Metric 12.9 Socket Shoulder Screws, Iso 7379, Thermal Black Oxide, Alloy
Metric socket shoulder screws manufactured to ISO 7379 and rated at Class 12.9 deliver the highest strength available for metric shoulder bolts. Made from premium alloy steel and finished with a thermal black oxide coating, these fasteners are engineered for applications requiring precise movement, alignment, pivoting, or sliding components.
The precision‑machined shoulder provides an accurate bearing surface, making these screws ideal for automation equipment, robotics, tooling, guides, linkages, fixtures, and machinery assemblies where smooth, repeatable motion is essential. The thermal black oxide finish enhances wear resistance, improves lubricity during installation, and creates a uniform, low‑glare black appearance for industrial environments.
For large scale orders, request a quote to receive our best pricing available for your custom order.
ISO 7379 socket shoulder screws offer consistent shoulder diameters, precise tolerances, and reliable thread fit for high‑precision engineering applications. Their Class 12.9 alloy steel construction provides exceptional tensile strength, load‑bearing capability, and fatigue resistance — essential for dynamic assemblies under stress or continuous use.
The thermal black oxide coating supplies mild corrosion protection and improved handling during assembly, making these fasteners well‑suited for OEM production, maintenance operations, and high‑performance machinery.
Available in a complete range of metric shoulder diameters, lengths, and thread sizes to meet demanding industrial and engineering specifications.
