S-91251A355 10-32 x 2 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 provides reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, wear-resistant finish for extended service life.
- Class 3A thread fit ensures precise, tight-tolerance engagement for secure fastening in critical assemblies.
- Partially threaded design allows for controlled clamping force and easier alignment in specific mounting scenarios.
- 5/32" hex drive socket head enables high-torque installation with standard tools, minimizing stripping and improving efficiency.
- Rockwell C37 hardness maintains structural integrity under heavy loads and repeated use, ensuring long-term durability.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency, environmental safety, and suitability for regulated industries.
Professional Applications & Engineering Value
Engineered for demanding environments, this 10-32 UNRF thread socket head cap screw addresses common industrial challenges such as vibration loosening and material fatigue. The black-oxide alloy steel construction combats rust and wear, while the fine thread spacing and Class 3A fit provide superior holding power in precision machinery, automotive systems, and heavy equipment. Its partially threaded shank allows for optimal stress distribution, preventing joint failure in dynamic applications. Ideal for assembly lines and maintenance operations, this fastener ensures reliable performance where high tensile strength and regulatory compliance are critical.
Specification Summary & Compliance
This screw features a 10-32 UNRF thread with Class 3A fit for high precision, a 2 1/2" length, and partial threading up to 7/8". It meets ASTM A574 specifications for alloy steel socket head cap screws, ensuring consistent quality and performance. The product is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, confirming adherence to environmental and safety standards for industrial use.
