S-91268A386 7/16"-14 x 4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Maximum load-bearing capacity with 150,000 psi tensile strength for critical structural applications
- Superior wear resistance due to Rockwell C33 hardness, extending service life in demanding environments
- Reliable fastening engagement through Class 2A thread fit and coarse UNC threading for vibration resistance
- Optimized torque transmission with external hex drive and 5/8" head width for secure installation
- Reduced material stress concentration through partial threading design below the 9/32" head height
- Industry-standard compatibility meeting ASME B18.2.1 and SAE J429 specifications for engineering consistency
- Environmental compliance assurance with RoHS 3 and REACH regulations for global industrial use
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws provide critical solutions where failure is not an option. The 7/16"-14 UNC coarse thread configuration delivers superior resistance to vibration loosening in machinery, construction equipment, and structural assemblies. Manufactured from high-strength steel with Rockwell C33 hardness, these fasteners withstand extreme mechanical stress while maintaining integrity. The partially threaded design concentrates strength where needed most, preventing stress fractures at the thread-to-shank transition. With 4" length and external hex drive, these screws offer optimal clamping force distribution for thick-section materials and structural steel connections.
Specification Summary & Compliance
This hex head screw features precision Class 2A thread fit with 7/16"-14 UNC coarse thread specifications, ensuring consistent engagement and dimensional accuracy. Manufactured to ASME B18.2.1 standards and SAE J429 Grade 8 requirements, these fasteners deliver guaranteed mechanical properties including 150,000 psi tensile strength. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and global market acceptance for industrial procurement.
