Description
The M20-2.5 Button Head Cap Screw is an industrial-grade, precision-engineered fastener built for maximum strength and performance in critical load-bearing applications. Its wide, rounded button-style head delivers a smooth, low-profile finish while distributing clamping force over a broader area—ideal for structural hardware where aesthetics and safety are both priorities. With an internal hex drive and coarse-thread pitch, this screw offers high torque capacity, easy installation, and excellent vibration resistance. Perfect for high-stress assemblies, exposed installations, and custom fabrication in heavy machinery, structural frameworks, and large-scale engineering projects.
Specifications
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Thread Size: M20 × 2.5 (ISO Metric Coarse)
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Head Type: Rounded button head with internal hex socket
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Drive Type: Hex socket (Allen)
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Length: Typically available in standard metric sizes from 25mm to 160mm
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Material: High-strength alloy steel; also available in A2/A4 stainless steel, zinc-plated, hot-dip galvanized, or black oxide variants
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Finish Options: Black oxide, plain, zinc-plated, hot-dip galvanized, or stainless
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Property Class: Typically Class 8.8 or 10.9 (for alloy steel), A2-70 or A4-80 (for stainless steel)
Key Features
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Extra-Wide Button Head: Provides a clean, finished look while maximizing contact area for clamping larger components.
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Coarse 2.5mm Thread Pitch: Supports faster engagement and superior performance under high vibration or dynamic loads.
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Internal Hex Drive: Ensures precise torque control and minimal tool slippage, even during high-torque installations.
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Corrosion-Resistant Finishes: Multiple protective coating options and stainless steel variants extend lifespan in outdoor, marine, or industrial environments.
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High-Load Capability with Visual Appeal: Combines brute strength with a refined, snag-resistant finish—ideal for exposed hardware on structural builds.
Typical Applications
The M20-2.5 Button Head Cap Screw is commonly used in:
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Structural Steel Frameworks and Industrial Machinery Bases
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Heavy Equipment Mounting, Presses, and Gantry Systems
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Construction Hardware and Large-Scale Architectural Metalwork
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Exposed Fastener Installations in Infrastructure and Bridge Components
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Custom Fabrication for Off-Road, Marine, or Military Applications
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Robotic Platforms, Lift Systems, and High-Stress Mechanical Assemblies
