Hexagon Socket Head Cap Screws

Hexagon socket head cap screws feature a cylindrical head with an internal hexagon socket, providing a compact fastening solution for applications where installation space is limited. The recessed socket allows the screws to be installed with a hex key while providing reliable clamping force and a clean, low-profile appearance.

We supply hexagon socket head cap screws in carbon steel, alloy steel, and stainless steel, with metric and inch threads in a wide range of sizes and lengths. Dimensions can be manufactured according to applicable standards such as DIN 912, ISO 4762, and ASME B18.3, while material and mechanical requirements can be specified according to standards such as ASTM A574 and ASTM F837. Production includes cold heading, socket forming, thread rolling, heat treatment, surface finishing, and final inspection.

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Metric Carbon and Alloy Steel Socket Head Cap Screws — ISO 898-1

Metric carbon and alloy steel socket head cap screws are available in property classes such as 8.8, 10.9 and 12.9. ISO 898-1 specifies their mechanical and physical properties, including tensile strength, yield strength, proof load and hardness. The selected property class determines the screw’s strength and load-bearing capacity for the intended fastening application.

Metric Stainless Steel Socket Head Cap Screws — ISO 3506-1

For metric stainless steel socket head cap screws, ISO 3506-1 defines mechanical properties according to stainless steel grade and property class. Common specifications include A2-70 and A4-70, with requirements for tensile strength, 0.2% proof stress and other applicable mechanical properties. The choice of stainless steel grade depends on the required corrosion resistance and operating environment.

Inch Alloy Steel Socket Head Cap Screws — ASTM A574

ASTM A574 covers high-strength alloy steel socket head cap screws in inch-series dimensions. The specification establishes mechanical requirements, including tensile strength and hardness, to ensure the fasteners meet the required strength levels. These screws are commonly used in machinery, equipment assemblies and other applications requiring high-strength fastening.

Inch Stainless Steel Socket Head Cap Screws — ASTM F837

ASTM F837 specifies requirements for stainless steel inch-series socket head cap screws. Mechanical properties vary according to the stainless steel alloy and condition specified, with tensile strength and hardness among the relevant requirements. These fasteners are suitable for assemblies that require a combination of mechanical strength and corrosion resistance.