S-90128A141 5/16"-24 x 5/8" 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 ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc plating protects against rust and extends service life in harsh industrial environments.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies with minimal backlash.
- Fine UNF thread design offers improved load distribution and better sealing capabilities compared to coarse threads.
- High hardness (Rockwell C37) enhances wear resistance and maintains thread integrity during repeated installations.
- Fully threaded shank allows for maximum grip length and flexibility in adjustment across various material thicknesses.
- Standard hex socket drive enables easy installation with common tools while providing a clean, flush finish.
Professional Applications & Engineering Value
These zinc-plated alloy steel socket head cap screws deliver critical reliability in demanding applications where high tensile strength and corrosion resistance are paramount. The Class 3A UNF fine threads provide superior clamping force and vibration resistance in precision machinery, automotive assemblies, and heavy equipment. Engineered with a fully threaded design, they ensure maximum engagement in tapped holes or when used with nuts, eliminating the need for multiple fastener types. The combination of 170,000 PSI tensile strength and Rockwell C37 hardness makes these socket head cap screws ideal for applications subjected to dynamic loads and frequent disassembly, while the zinc plating offers essential protection in outdoor or chemically exposed environments.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit and 5/16"-24 UNF fine threads for precision assembly. Complies with ASTM A574 specification for alloy steel socket head cap screws. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features right-hand thread direction and standard socket head profile with 1/4" hex drive for consistent installation torque.
