S-95362A447 1/2"-13 x 4" ASME B18.2.1, SAE J429, ASTM A354BD, MS90728-123 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, ideal for high-stress industrial assemblies
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments
- Reliable mechanical performance ensured by Grade 8 classification and Rockwell C33 hardness
- Optimized thread engagement through UNC coarse threading and Class 2A fit for quick assembly and vibration resistance
- Secure installation and removal enabled by external hex drive and 3/4" head width for standard wrench compatibility
- Partial threading design allows for precise clamping force distribution in structural applications
- Full regulatory compliance with REACH and multiple industry standards for global project suitability
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assembly. The steel construction with zinc yellow-chromate plating provides essential corrosion protection in manufacturing plants, outdoor installations, and high-humidity environments. The 1/2"-13 UNC coarse thread configuration ensures rapid installation while maintaining vibration resistance in dynamic load conditions. With partial threading and 4" length, it offers precise joint clamping where full thread engagement isn't required, preventing material distortion in critical connections. These industrial screws meet the demanding requirements of construction, automotive, and heavy equipment industries where failure is not an option.
Specification Summary & Compliance
Manufactured to Class 2A thread fit tolerances with UNC coarse thread specifications. Complies with ASME B18.2.1, SAE J429, ASTM A354BD, and MS90728-123 standards. Meets REACH (EC 1907/2006) compliance requirements and contains no SVHC above threshold levels. The Grade 8 classification guarantees consistent mechanical properties including 150,000 psi tensile strength and Rockwell C33 hardness.
