S-92220A211 1/4"-28 x 1/2" ASTM A574 Alloy Steel Low-Profile Socket Head Screws
Alloy Steel Low-Profile 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
- Precise Class 3A thread fit ensures reliable, vibration-resistant connections in critical assemblies
- Exceptional 140,000 psi tensile strength provides maximum load-bearing capacity for heavy-duty applications
- Low-profile socket head design allows installation in confined spaces while maintaining high torque capability
- Fine UNF thread spacing delivers superior clamping force distribution and improved fatigue resistance
- Full threading along entire length enables flexible positioning and secure fastening at any point
- Rockwell C39 hardness rating maintains dimensional stability under extreme mechanical stress
Professional Applications & Engineering Value
Engineered for precision industrial applications, these black-oxide alloy steel socket head cap screws address critical challenges in machinery assembly, automotive systems, and heavy equipment manufacturing. The 1/4"-28 UNF fine thread configuration with Class 3A fit provides exceptional vibration resistance, preventing loosening in dynamic operating conditions. The low-profile socket head accommodates space-constrained designs while the 1/8" hex drive ensures secure tool engagement during high-torque installation. The combination of 140,000 psi tensile strength and corrosion-resistant black-oxide finish delivers long-term reliability in harsh environments, making these fasteners ideal for applications requiring both mechanical performance and environmental durability.
Specification Summary & Compliance
Manufactured to ASTM A574 specifications with precision Class 3A thread fit and UNF fine thread spacing. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Features right-hand thread direction and fully threaded design with dimensional accuracy maintained through Rockwell C39 hardness treatment for consistent performance in inch-system applications.
