Alloy steel hex socket cap screws are precision-engineered fasteners designed for applications requiring superior strength, torque resistance, and compact head installation. With a cylindrical head and internal hex drive, these screws offer a clean appearance and efficient tool engagement—ideal for high-load mechanical, automotive, and industrial assemblies.
Made from high-grade alloy steel and heat-treated for maximum durability, our hex socket screws are available in multiple sizes and finishes to meet international mechanical and engineering standards.
🔩 Product Overview
Type: Hex Socket Cap Screw
Standard: DIN 912 / ISO 4762 / ANSI B18.3
Head Type: Cylindrical with Hex Drive (Allen)
Drive Style: Internal Hexagon (Socket Head)
Thread Sizes:
- Metric: M3, M4, M5, M6, M8, M10, M12, M16, M20
- Inch: #4-40, #6-32, 1/4″-20, 3/8″-16, 1/2″-13, etc.
Length Range:
- 6mm to 200mm (customizable)
Material:
- Alloy Steel (Grade 12.9 / 10.9 / ASTM A574)
Surface Finish Options:
- Black Oxide
- Zinc Plated (Clear/Yellow)
- Phosphate Coated
- Plain
⚙️ Typical Applications
- Machinery and Equipment Assembly
- Automotive Engines and Frames
- Robotics and Automation Systems
- Aerospace Components
- Industrial Tooling and Fixtures
✅ Key Features
✔️ High tensile and yield strength for critical load areas
✔️ Compact head fits limited-space assemblies
✔️ Allen drive ensures strong torque resistance and minimal stripping
✔️ Heat-treated for enhanced hardness and fatigue life
✔️ Excellent performance in dynamic and vibrating environments
📦 Packaging & Supply Details
- MOQ: 1,000 pcs per size
- Packaging: Bulk in cartons / Carton + Pallet / Custom box with logo
- Lead Time: 7–12 working days
- OEM/ODM support for special sizes and head types
📩 Looking for alloy steel socket cap screws with top-grade strength and reliability?
We’re a direct manufacturer providing durable, precision-machined fasteners for global industries. Contact us for samples, technical data, and customized solutions.