Description
The 5/16"-18 Socket Head Cap Screw is a medium-diameter, high-strength fastener engineered for precision and reliability in a wide range of industrial, mechanical, and structural applications. With its recessed hexagonal drive and cylindrical head, this screw supports efficient torque transmission in tight or recessed areas, making it ideal for compact assemblies requiring a strong and flush fastener.
Specifications
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Thread Size: 5/16"-18 (Unified National Coarse)
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Head Type: Cylindrical socket head with internal hex drive
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Drive Type: Hex socket (Allen)
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Length: Available in standard lengths (typically from 1/2" to 4")
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Material: Usually 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 (alloy steel), or 18-8 / 316 (stainless steel)
Key Features
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Compact and Strong: Balances compact dimensions with excellent tensile strength, making it suitable for medium-load mechanical applications.
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Precision Threads: Machined to ensure tight engagement with compatible 5/16"-18 UNC tapped holes or standard nuts.
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Low-Profile Head: Allows flush mounting or installation in counterbored holes without sacrificing clamping force.
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Reliable Torque Transfer: The internal hex drive supports controlled tightening and reduced risk of stripping.
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Corrosion-Resistant Options: Available with stainless steel and coated finishes for extended performance in outdoor or corrosive environments.
Typical Applications
The 5/16"-18 Socket Head Cap Screw is ideal for medium-duty tasks across various industries:
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Mechanical and Electrical Assemblies
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Fixture Mounting and Machine Guards
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Automotive and Motorcycle Components
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Jigs and Precision Tooling
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Light-to-Medium Structural Connections
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Robotics, Frames, and Modular Equipment
