S-91251A827 8-32 x 2 3/4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant connections in machinery and equipment.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable finish, extending service life in demanding environments.
• Partially threaded design with coarse UNRC threads allows for easier alignment and faster installation, improving assembly efficiency.
• Hex socket drive (9/64") enables high-torque application with standard tools, minimizing stripping and ensuring consistent clamping force.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting rigorous industrial standards.
• Rockwell C37 hardness balances toughness and machinability, providing long-term durability without brittleness.

Professional Applications & Engineering Value

Engineered for industrial fastening solutions, this 8-32 thread socket head cap screw addresses common challenges like vibration loosening and corrosion in machinery assembly. The black-oxide alloy steel construction, combined with a coarse UNRC thread and partial threading, ensures quick, secure installations in tight spaces, reducing downtime. Its high tensile strength and Class 3A fit make it ideal for precision equipment, automotive components, and heavy-duty frameworks, where reliability and compliance with ASTM A574 are critical. The hex drive design further supports efficient maintenance and disassembly, enhancing operational workflow in B2B settings.

Specification Summary & Compliance

This screw features a 2-3/4" length with a min thread length of 7/8", right-hand thread direction, and standard socket head profile. It adheres to Class 3A thread fit for precise tolerances and meets ASTM A574 specifications for material integrity. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it ensures environmental and safety standards are upheld in industrial applications.