Description
The M20-2.5 Flat Head Socket Cap Screw is a heavy-duty precision fastener engineered for large-scale structural and mechanical applications that demand exceptional strength and a clean, flush finish. Its countersunk flat head and internal hex drive allow precise torque control, tight engagement, and a streamlined appearance, making it ideal for industrial assemblies where both performance and presentation matter.
Specifications
Thread Size: M20 × 2.5 (ISO Metric Coarse)
Head Type: Flat head with internal hex socket (countersunk)
Drive Type: Hex socket (Allen)
Length: Commonly available in standard metric lengths from 30 mm to 180 mm
Material: High-strength alloy steel; also available in stainless steel, zinc-plated, or black oxide finishes
Finish Options: Black oxide, plain, zinc-plated, or full stainless steel
Property Class: Typically Class 8.8 or 10.9 (alloy steel); A2-70 or A4-80 (stainless steel)
Key Features
Flush-Fit Head Design:
The flat, countersunk head sits level with or below the mounting surface, providing a smooth, low-profile finish ideal for assemblies that require both aerodynamic performance and a professional appearance.
Standard Coarse Thread:
The 2.5 mm pitch offers superior thread engagement and strong load distribution, ensuring stability under extreme mechanical stress or vibration.
Precision Torque Control:
The internal hex drive supports high torque application with reliable grip and alignment, even in recessed or limited-access areas.
Unmatched Strength and Corrosion Resistance:
Engineered in high-tensile alloy steel for maximum load-bearing capacity or stainless steel for optimal corrosion resistance in harsh environments.
Industrial-Grade Finish:
Offered in multiple surface treatments—black oxide, zinc-plated, or full stainless steel—to suit diverse mechanical, structural, and environmental requirements.
Typical Applications
The M20-2.5 Flat Head Socket Cap Screw is ideal for:
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Heavy industrial machinery and equipment assembly
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Construction and structural steel fabrication
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Automotive and off-road vehicle frame and suspension systems
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Aerospace, marine, and defense hardware requiring flush-fit fasteners
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Large-scale mechanical frameworks and infrastructure components
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High-strength precision builds where durability and surface smoothness are essential
