S-91251A236 4-48 x 5/16" 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 under high-stress conditions, reducing the risk of fastener failure.
- Precise Class 3A thread fit provides superior thread engagement and vibration resistance, ideal for applications requiring tight tolerances.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish for extended service life.
- Fine UNF thread spacing delivers improved clamping force and better load distribution in fine-pitch applications.
- Fully threaded design allows for consistent holding power along the entire length, simplifying installation in deep or tapped holes.
- Rockwell C37 hardness combines high strength with good ductility, minimizing wear and deformation during repeated use.
- Compact 3/32" hex drive enables easy installation in confined spaces with standard tools, improving assembly efficiency.
Professional Applications & Engineering Value
This 4-48 UNF thread socket head cap screw is engineered to address critical challenges in precision assembly and high-vibration environments. The black-oxide alloy steel construction provides excellent resistance to rust and wear, making it suitable for automotive, aerospace, and machinery applications where durability is paramount. The fine thread spacing and Class 3A fit ensure secure fastening in materials prone to stripping, while the fully threaded rod type offers uniform stress distribution. Its high tensile strength and Rockwell C37 hardness prevent loosening under dynamic loads, reducing maintenance needs and enhancing operational safety in industrial settings.
Specification Summary & Compliance
This socket head cap screw features a right-hand thread direction with Class 3A thread fit for precise dimensional accuracy. It complies with ASTM A574 specifications for high-strength fasteners and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in various industries. The inch system measurements, including 5/16" length and 3/32" drive size, adhere to standardized industrial requirements for compatibility and performance.
