S-91251A002 7/16"-20 x 1 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 for extended service life in demanding environments
- Exceptional load-bearing capability with 170,000 psi tensile strength for critical high-stress applications
- Precise thread engagement with Class 3A fit ensuring reliable, vibration-resistant connections
- Optimized torque transmission through 3/8" hex drive design preventing tool slippage and damage
- Enhanced durability with Rockwell C37 hardness maintaining structural integrity under repeated stress
- Full-thread design providing maximum grip length and uniform stress distribution
- Regulatory compliance meeting ASTM A574, RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
These black-oxide alloy steel socket head cap screws deliver critical performance advantages in heavy machinery, automotive assemblies, and precision equipment where vibration resistance and high tensile strength are paramount. The 7/16"-20 UNF fine thread configuration with Class 3A precision fit ensures superior clamping force retention in dynamic load conditions, while the fully threaded design provides consistent engagement across the entire fastener length. The corrosion-resistant black-oxide surface treatment combined with the socket head profile allows for reliable installation in confined spaces, making these fasteners ideal for applications requiring both exceptional mechanical properties and efficient assembly processes in industrial manufacturing environments.
Specification Summary & Compliance
Manufactured to ASTM A574 specifications with Class 3A thread fit precision and UNF fine thread standards. These socket head cap screws maintain dimensional accuracy with 7/16"-20 thread size and 1-1/4" length. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for global industrial applications requiring restricted substance control.
