ISO 7379 Black Oxide Hexagon Socket Head Alloy Steel Shoulder Screw

Key Features & Advantages:
1.Hex Socket Drive Design
Featuring a standard hex socket (cup head) drive, compatible with Allen keys or power bits, these screws offer high torque transmission efficiency, reduced slipping, and can withstand high torque for high-load, high-stress applications.
2.Alloy Steel Material, High Strength & Wear Resistance
Made of premium alloy steel (e.g., 40Cr/Grade 8.8/12.9) with quenched and tempered heat treatment, they offer high hardness, toughness, and tensile strength far exceeding ordinary carbon steel. They have excellent wear and fatigue resistance, resisting breakage and deformation.
3.Shoulder Shank for Precision Positioning

The smooth cylindrical shoulder shank provides a clearance fit with mounting holes, enabling precise positioning and guidance. It withstands shear forces to prevent component offset and movement, improving assembly accuracy and stability.
4.Multiple Surface Treatments for Multi-Environment Compatibility
Available with black oxide, zinc plating, Dacromet, and other finishes for corrosion, wear, and weather resistance, suitable for indoor, outdoor, and mildly corrosive environments.
5.Wide Range of Sizes
Available in diameters from M3 to M20 and various lengths, with customizable shoulder diameters and lengths to fit different mounting holes, load requirements, and working conditions.
6.High-Precision Machining with Tight Tolerances
The shoulder shank is precision turned for high concentricity and tight tolerance control, ensuring smooth installation without jamming, suitable for automated equipment and precision machinery assembly.

Common Applications:

• Precision Machinery Manufacturing: Positioning and connection of automated equipment, CNC machine tools, and precision instruments, such as guide rail fixing and slider guidance.
• Molds & Tooling Fixtures: Locating pins and guides for molds, fixtures, and jigs, withstanding shear forces to ensure mold opening/closing accuracy.
• Industrial Automation Equipment: Component fixing and guidance for conveyor lines, robots, and automated production lines, suitable for high-speed moving parts.
• Automotive & Rail Transportation: Connection and positioning of automotive engine parts, chassis accessories, and rail transportation equipment in high-load applications.
• Aerospace & Defense: Fasteners for precision instruments and defense equipment, in high-strength, high-precision scenarios.
• Electronic Equipment Manufacturing: Internal positioning and connection of large equipment enclosures and communication devices, meeting high-precision assembly requirements.
• Repair & Renovation Projects: Positioning and reinforcement in equipment maintenance and tooling modification, replacing worn shoulder screws to restore equipment accuracy.