Description
The 3/8"-16 Flat Head Cap Screw is a medium-duty, flush-mount fastener engineered for structural, mechanical, and safety-critical applications where a smooth surface finish and secure hold are essential. With its 82° countersunk flat head and internal hex socket, this fastener combines strength with precision torque control, making it ideal for tight-clearance or exposed installations.
Specifications
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Thread Size: 3/8"-16 (Unified National Coarse)
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Head Type: Flat head with 82° countersink and internal hex drive
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Drive Type: Hex socket (Allen)
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Length: Available in standard lengths (typically from 3/4" to 4")
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Material: Alloy steel; also available in stainless steel, black oxide, or zinc-plated finishes
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Finish Options: Black oxide, plain, zinc-plated, or stainless
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Grade: Typically Grade 8 (hardened alloy steel), or 18-8 / 316 stainless steel for corrosion resistance
Key Features
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Flush Countersunk Head: Sits level with or below the surface when installed in a properly countersunk hole, ideal for clearance-sensitive or aesthetic applications.
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Reliable Strength: The 3/8" diameter coarse-threaded shank offers robust holding power for medium-load mechanical assemblies.
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Controlled Torque Application: Internal hex socket provides precise, slip-resistant torque delivery without damaging the fastener or surface.
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Corrosion-Resistant Finishes: Available in stainless and coated versions for long-lasting use in harsh or outdoor environments.
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Precision Threading: Machined to UNC standards for secure engagement with tapped holes or matching nuts.
Typical Applications
The 3/8"-16 Flat Head Cap Screw is ideal for flush-mounted mechanical and structural assemblies such as:
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Machinery Guards and Safety Panels
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Brackets and Framing Components
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Sheet Metal Fabrication and Chassis Mounting
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Automotive, Motorcycle, and Utility Vehicles
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Industrial Equipment and Tooling Systems
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Robotics, Fixtures, and Modular Frames
