S-95362A209 5/16"-18 x 1 1/2" ASME B18.2.1, SAE J429, ASTM A354BD, MS90728-38 Mil. Spec. High-Strength Steel Hex Head Screws
Mil. Spec. High-Strength Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc yellow-chromate plating, extending service life in demanding environments
- Optimized thread engagement with UNC coarse threads providing faster assembly and reduced cross-threading risk
- Enhanced durability with Rockwell C33 hardness maintaining structural integrity under repeated stress
- Secure fastening capability through external hex drive design allowing high torque application without slippage
- Precision manufacturing ensuring Class 2A thread fit for consistent performance and easy installation
- Reduced weight without compromising strength through partial threading design where full threads aren't required
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, construction equipment, and industrial assemblies where failure is not an option. The steel construction with Rockwell C33 hardness provides exceptional resistance to vibration loosening and mechanical stress, while the zinc yellow-chromate plating offers superior protection against corrosion in harsh environments. The 5/16"-18 UNC coarse thread configuration ensures rapid installation in structural applications, and the external hex drive accommodates high torque requirements without stripping. These partially threaded fasteners are engineered specifically for applications requiring precise clamp load distribution, making them ideal for automotive, manufacturing, and heavy equipment sectors where reliability and durability are paramount.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances with UNC coarse thread specifications. Complies with ASME B18.2.1, SAE J429, and ASTM A354BD standards, ensuring consistent quality and performance. Meets REACH (EC 1907/2006) compliance requirements and conforms to MS90728-38 specifications. The Grade 8 classification guarantees 150,000 psi tensile strength and Rockwell C33 hardness for demanding industrial applications.
