S-91251A050 3/4"-16 x 3 1/4" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket 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 black-oxide coating, extending service life in demanding industrial environments
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress applications
- Precision Class 3A thread fit provides superior vibration resistance and secure fastening in critical assemblies
- Rockwell C37 hardness delivers excellent wear resistance and maintains thread integrity through repeated use
- 5/8" hex drive design allows for high-torque installation with standard tools, reducing assembly time
- Partially threaded configuration enables precise clamping force control and prevents thread damage
- Fine thread spacing offers improved adjustment precision and better load distribution
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these black-oxide alloy steel socket head cap screws solve critical fastening challenges in machinery, equipment manufacturing, and structural assemblies. The UNRF fine thread configuration provides superior resistance to vibration loosening, while the Class 3A thread fit ensures precise engagement in high-precision components. The partially threaded design allows for optimal clamp load distribution, preventing joint failure in dynamic loading conditions. With 170,000 psi tensile strength and Rockwell C37 hardness, these fasteners maintain integrity in high-stress environments, making them ideal for critical connections in manufacturing equipment, automotive systems, and industrial machinery where reliability is paramount.
Specification Summary & Compliance
This 3/4"-16 UNRF socket head cap screw features Class 3A thread tolerance for precision fit and fine thread spacing for superior load distribution. Manufactured to ASTM A574 specification for high-strength alloy steel fasteners. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors. The partially threaded design with minimum 2" thread length provides optimal fastening performance while maintaining structural integrity.
