S-91251A395 5/16"-24 x 3 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 ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Black-oxide coating on alloy steel provides corrosion resistance and a durable finish, extending service life in demanding environments.
- Class 3A thread fit with UNRF fine threads delivers superior vibration resistance and precise assembly, minimizing loosening in critical machinery.
- Rockwell C37 hardness offers excellent wear resistance, maintaining structural integrity under repeated loads and harsh conditions.
- Partially threaded design with 1/4" hex drive allows for easy installation and secure fastening in confined spaces, improving assembly efficiency.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees adherence to international standards, ensuring safety and environmental responsibility.
- Right-hand fine thread spacing enhances grip and load distribution, ideal for applications requiring high clamping force and stability.
Professional Applications & Engineering Value
This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address common industrial challenges, such as vibration-induced loosening and corrosion in heavy-duty equipment. With its UNRF fine thread and Class 3A fit, it provides superior holding power in precision assemblies like automotive engines, aerospace components, and machinery frames. The partially threaded rod type allows for targeted fastening, reducing stress concentration, while the 1/4" hex drive ensures easy installation with standard tools. Ideal for applications requiring high tensile strength and durability, this screw minimizes maintenance needs and enhances operational reliability in demanding environments.
Specification Summary & Compliance
This product meets precise dimensional standards, including Class 3A thread fit and UNRF thread type with fine spacing for accurate engagement. Manufactured in accordance with ASTM A574 specifications, it ensures consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmental safety and regulatory requirements for industrial use.
