S-91251A361 10-32 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
- Superior tensile strength of 170,000 psi ensures reliable performance under extreme loads and vibrations.
- Enhanced corrosion resistance from the black-oxide finish prolongs service life in harsh industrial environments.
- Precise Class 3A thread fit provides excellent engagement and reduces the risk of cross-threading during assembly.
- Fine thread spacing (UNRF) offers improved adjustment accuracy and superior holding power in critical applications.
- High hardness (Rockwell C37) delivers exceptional wear resistance and maintains thread integrity over repeated use.
- Hex socket drive (5/32") allows for high-torque installation with standard tools, minimizing head stripping.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency and environmental safety for global supply chains.
Professional Applications & Engineering Value
Engineered for demanding applications, these black-oxide alloy steel socket head cap screws combine high tensile strength and fine UNRF threads to address common challenges in machinery assembly, automotive systems, and precision equipment. The Class 3A thread fit ensures minimal backlash and secure fastening in high-vibration settings, while the partially threaded design with a 7/8" minimum thread length allows for optimized clamp load distribution. The black-oxide surface treatment resists rust and wear, making these screws ideal for environments exposed to moisture, chemicals, or temperature fluctuations. By meeting ASTM A574 specifications, they provide consistent mechanical properties, reducing the risk of fastener failure and maintenance downtime in industrial operations.
Specification Summary & Compliance
This socket head cap screw adheres to inch system measurements with a 10-32 UNRF fine thread and Class 3A tolerance for precise fit. It is manufactured in compliance with ASTM A574 for high-strength alloy steel fasteners and is confirmed RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety regulations.
