S-91251A462 1/4"-28 x 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
- Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Precise Class 3A thread fit provides superior engagement and vibration resistance, maintaining joint integrity in demanding environments.
- Black-oxide surface treatment on alloy steel offers enhanced corrosion resistance, extending service life in various industrial conditions.
- Fine thread spacing (UNRF) allows for finer adjustments and improved clamping force control in precision assemblies.
- Hex socket drive design enables high torque application and easy installation in confined spaces, boosting assembly efficiency.
- Rockwell C37 hardness ensures excellent wear resistance and durability, minimizing deformation under repeated loads.
- Full threading provides consistent holding power along the entire length, ideal for secure fastening in diverse materials.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in precision machinery, automotive, and aerospace sectors where high tensile strength and corrosion resistance are paramount. The fine UNRF thread and Class 3A fit ensure tight tolerances and reliable performance in applications susceptible to vibration, such as engine components and robotic assemblies. Its hex drive socket facilitates secure installation with standard tools, reducing assembly time while maintaining 170,000 psi tensile rating for heavy-duty use. By combining ASTM A574 compliance with robust material properties, this fastener delivers long-term reliability in harsh environments, minimizing maintenance needs and downtime.
Specification Summary & Compliance
This socket head cap screw features a 1/4"-28 UNRF fine thread with Class 3A fit for precise dimensional accuracy, ensuring consistent performance in inch-based systems. Manufactured in accordance with ASTM A574 specifications, it meets stringent quality standards for alloy steel fasteners. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety requirements for industrial use.
