S-91309A837 3/4"-10 x 1 1/4" ASME B18.2.1, SAE J429 Low-Strength Steel Hex Head Screws
Low-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
- Superior corrosion resistance with zinc plating that protects against rust and extends service life in harsh environments
- High tensile strength of 60,000 PSI ensures reliable performance under heavy loads and prevents fastener failure
- Class 2A thread fit provides consistent, easy assembly and disassembly while maintaining secure connections
- Coarse UNC threads offer faster installation and better performance in materials prone to stripping or vibration
- External hex drive design allows for high torque application with standard tools, reducing installation time
- Full threading along the entire 1 1/4" length maximizes grip strength and distributes stress evenly
- Rockwell B69 hardness rating maintains thread integrity and prevents deformation during repeated use
Professional Applications & Engineering Value
This 3/4"-10 UNC hex head screw delivers exceptional engineering value for industrial applications where vibration resistance and structural integrity are critical. The high-strength steel construction combined with zinc plating addresses common corrosion challenges in manufacturing facilities, construction sites, and heavy equipment assembly. The coarse thread design provides superior holding power in softer materials and resists loosening under dynamic loads, while the external hex drive enables efficient installation in confined spaces. These fully threaded hex screws are engineered to maintain clamping force in high-stress applications, from machinery frames to structural steel connections, ensuring long-term reliability and reduced maintenance requirements.
Specification Summary & Compliance
This hex head screw features precision Class 2A thread fit with UNC coarse threads measuring 3/4"-10. Manufactured to exacting ASME B18.2.1 specifications and SAE J429 standards, ensuring dimensional accuracy and interchangeability. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting environmental and safety requirements for industrial use worldwide.
