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Socket Head Cap Screw
Widely used in machinery, automotive, aerospace and industrial equipment, it allows tight installation in limited spaces with an Allen key. Its smooth head design reduces protrusion, while precise threads ensure stable connection under vibration and heavy loads, making it an essential component for precision engineering and assembly.
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▍Product Advantage
High Precision & Compact Cylindrical Head Design
The slim cylindrical head allows installation in confined spaces, with a low-profile design that reduces protrusion and interference. Precision CNC machining ensures head concentricity within 0.05mm, delivering a clean, flush fit for precision machinery and equipment.
Superior Material Strength & Load Capacity
Crafted from Grade 8.8/10.9/12.9 carbon steel or 304/316 stainless steel, it offers tensile strength up to 1200MPa (Grade 12.9). This high-strength construction withstands heavy dynamic loads and vibration, preventing breakage or loosening in industrial applications.
Internal Hex Socket Drive for Secure Operation
The hexagonal socket drive enables precise torque transmission with an Allen key, minimizing cam-out and slippage during installation. It supports torque values up to 80N·m (M10 Grade 12.9), ensuring consistent, reliable fastening without head damage.
Corrosion Resistance & Long Service Life
Available with zinc plating (coating ≥65μm) or passivation, it provides excellent rust and corrosion resistance. Stainless steel variants perform well in harsh environments, extending service life to 8–10 years and reducing maintenance costs.
Versatile Compatibility & Wide Application
Compatible with metric thread standards (M3–M20), it suits diverse industries including automotive, aerospace, electronics and industrial machinery. Its stable performance makes it ideal for high-precision assemblies requiring reliable, long-term fastening.
▍Technical Parameters
| Item | Specification Details | Remarks |
| Product Name | T-bolt / T-head Bolt | Allen Head Bolt, HexSocket Cap Screw |
| Executive Standard | DIN 912, ISO 4762, GB/T70.1 | International UniversalMechanical Standard |
| Material Grade | Carbon Steel8.8/10.9/12.9; 304/316Stainless Steel | High-Strength AlloyOptional for Heavy-DutyUse |
| Thread Specification | Metric Thread: M3-M20 | UNC/UNF ImperialThread Customizable |
| Length Range | 6mm-200mm | Non-Standard CustomLength Supported |
| Tensile Strength | 800MPa(8.8),1000MPa(10.9),1200MPa(12.9) | Grade 12.9 for ExtremeLoad Conditions |
| Surface Treatment | Zinc Plated, Black Oxide,Passivation, Plain | Zinc Coating Thickness>65um |
| Drive Type | Internal Hex Socket(Allen Key Drive) | Match Standard AllenWrench Size |
| Hardness Range | HRC 22-44 (Depends onMaterial Grade) | Anti-Deformation & Anti-Fracture |
| Application Temperature | -20°C to 120°C (CarbonSteel); -20°C to 200°C(Stainless Steel) | Adapt to Harsh IndustrialEnvironments |
▍Product Uses
Precision Machinery & Equipment:
Widely used for assembling machine tools, automation equipment and instrumentation. The low-profile socket head fits narrow spaces perfectly, providing stable fastening under high-speed operation and frequent vibration.
Automotive & Aerospace Industry:
Applied to vehicle parts, engine components and aerospace equipment assembly. Its high-strength design meets strict safety standards, ensuring reliable locking in harsh driving and flying environments.
▍Product Operate Guide
Select a matching Allen wrench to insert into the internal hex socket, tighten the screw evenly with standard torque. Do not over-tighten to avoid thread or head damage. Keep the driving part clean during use, and check fastening status regularly for long-term stability.
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