S-94239A106 5/16"-18 x 3/4" SAE J429 High-Strength Grade 8 Steel Serrated-Flange Hex Head Screws
High-Strength Grade 8 Steel Serrated-Flange 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-plated steel construction, extending service life in demanding environments
- Enhanced vibration resistance with serrated locking flange that prevents loosening under dynamic loads
- Optimal thread engagement through Class 2A thread fit and UNC coarse threading for faster assembly and secure fastening
- Maximum driving torque capability with external hex drive design that withstands high installation forces
- Full-length thread coverage ensures consistent clamping force distribution along the entire fastener length
- Premium material hardness at Rockwell C33 provides excellent wear resistance and durability
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance in construction equipment, machinery assembly, and structural frameworks where high tensile strength and vibration resistance are critical. The zinc-plated steel construction provides reliable corrosion protection in harsh environments, while the serrated flange eliminates the need for separate washers and prevents rotational loosening under dynamic loads. The UNC coarse thread design ensures quick installation and superior holding power in various materials, making these fully threaded fasteners ideal for applications requiring uniform clamping force distribution. The external hex drive accommodates high torque applications, providing secure fastening in automotive, manufacturing, and heavy equipment sectors where failure is not an option.
Specification Summary & Compliance
This 5/16"-18 x 3/4" hex head screw features Class 2A thread fit tolerance for precise engagement and meets rigorous industry standards including IFI 111 and SAE J429 specifications. The fastener maintains compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. Manufacturing follows exacting dimensional requirements with UNC coarse threading and proper thread spacing for optimal performance in demanding applications.
