S-91251A955 1 1/2"-6 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 under extreme loads, reducing the risk of fastener failure in demanding applications.
- Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
- High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining thread integrity through repeated use.
- Coarse UNRC threads with Class 2A fit offer faster assembly and reduced cross-threading risks, improving installation efficiency.
- Deep 1" hex drive socket allows for high torque application and secure fastening in confined spaces.
- Full threading along the 3½" length ensures consistent clamping force distribution across the entire engagement area.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global industrial use.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw delivers critical engineering solutions where high strength and durability are paramount. The 1½"-6 UNRC coarse thread design prevents loosening under vibration, making it ideal for heavy machinery, construction equipment, and automotive assemblies. The fully threaded configuration ensures uniform stress distribution, while the hex drive accommodates high torque requirements without stripping. Its black-oxide surface treatment resists rust and wear in corrosive settings, reducing maintenance downtime. Engineered to ASTM A574 specifications, this fastener provides reliable performance in critical joints, supporting structural integrity and operational safety in industrial applications.
Specification Summary & Compliance
This socket head cap screw features precise Class 2A thread fit with 1½"-6 UNRC coarse threads and right-hand orientation. Manufacturing adheres to ASTM A574 standards for consistent quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability.
