S-91251A722 1/2"-13 x 2 1/2" 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
- Exceptional tensile strength of 170,000 PSI provides reliable performance in high-stress industrial applications
- Superior corrosion resistance from black-oxide coating extends service life in demanding environments
- Precision Class 3A thread fit ensures consistent engagement and vibration resistance
- Hex socket drive design allows for high-torque installation in confined spaces
- Partially threaded configuration provides optimal clamping force distribution
- Rockwell C37 hardness rating maintains structural integrity under repeated loading
- Coarse UNC threading enables quick assembly and reduced cross-threading risks
Professional Applications & Engineering Value
These black-oxide alloy steel socket head cap screws deliver critical performance advantages for industrial machinery, heavy equipment, and precision assembly applications. The combination of 170,000 PSI tensile strength and Rockwell C37 hardness provides exceptional resistance to shear forces and fatigue, making them ideal for high-vibration environments. The partially threaded design concentrates clamping force precisely where needed, while the coarse UNC 1/2"-13 threading ensures rapid installation without compromising joint integrity. The black-oxide surface treatment offers superior corrosion protection compared to standard finishes, extending maintenance intervals in challenging operating conditions. These socket head cap screws are engineered to maintain critical tolerances in applications requiring repeated disassembly and reassembly.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread fit standards with UNC coarse threading (1/2"-13) and 3/8" hex drive configuration. These socket head cap screws comply with ASTM A574 specification for high-strength requirements. The products are fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety standards for industrial components. The 2-1/2" length with 1-1/2" minimum thread length provides optimal engagement for various material thicknesses.
