S-91286A204 3/8"-16 x 1 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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 protection through zinc-flake coating, extending service life in harsh industrial environments
- Optimized torque transmission with external hex drive design for secure installation and removal
- Enhanced mechanical stability with Rockwell C33 hardness rating, resisting deformation under heavy loads
- Secure fastening performance through Class 2A thread fit and coarse UNC threading for vibration resistance
- Versatile application compatibility with partial threading design allowing for both clamping and alignment functions
- Regulatory compliance assurance meeting multiple industry standards for quality and environmental safety
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where high tensile strength and reliable fastening are paramount. The steel construction with Rockwell C33 hardness ensures exceptional resistance to shear forces and mechanical stress, while the zinc-flake coating provides superior corrosion protection in demanding environments. The 3/8"-16 UNC coarse thread design offers excellent engagement in various materials, and the partial threading allows for precise clamping force distribution. These industrial screws are engineered to prevent joint failure in applications ranging from construction equipment to manufacturing machinery, providing long-term reliability and reduced maintenance requirements.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 and SAE J429 specifications with Class 2A thread fit for consistent dimensional accuracy. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features UNC coarse threading with 0.375" thread diameter and 1" minimum thread length on a 1 1/2" overall length fastener.
