S-91251A880 7/8"-9 x 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 mechanical loads, reducing the risk of fastener failure in demanding applications.
- Superior corrosion resistance from the Black-Oxide finish extends service life and maintains integrity in harsh industrial environments.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies with minimal play.
- High hardness rating (Rockwell C37) enhances wear resistance and durability, ideal for repetitive or high-stress use.
- 3/4" hex drive design allows for high-torque installation with standard tools, improving assembly efficiency and reducing stripping risks.
- Coarse UNRC threading enables faster installation and better grip in softer materials or where rapid disassembly is needed.
- Full compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and global regulatory acceptance.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Black-Oxide Alloy Steel Socket Head Cap Screw addresses critical challenges in machinery, construction, and automotive sectors where high tensile strength and corrosion resistance are paramount. The Class 3A thread fit and coarse UNRC thread design minimize loosening under vibration, while the 3/4" hex drive accommodates high torque for secure fastening in structural assemblies. Its fully threaded rod and ASTM A574 compliance guarantee consistent performance in demanding environments, reducing maintenance needs and enhancing operational reliability for B2B clients seeking durable, specification-grade industrial fasteners.
Specification Summary & Compliance
This socket head cap screw features a 7/8"-9 UNRC coarse thread with Class 3A fit for precise dimensional accuracy, and is manufactured from Alloy Steel with a Black-Oxide surface treatment. It meets ASTM A574 specifications for high-strength bolts, and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are upheld.
