S-91251A346 10-32 x 7/8" 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.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in demanding industrial environments.
• Precise Class 3A thread fit with UNRF fine threads provides secure, vibration-resistant fastening for critical assemblies.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
• Hex socket drive design allows for high torque application and easy installation in confined spaces with standard tools.
• Full thread coverage along the 7/8" length ensures consistent clamping force and versatile positioning in various materials.
• Compliance with major standards including ASTM A574 guarantees material quality and manufacturing consistency.

Professional Applications & Engineering Value

These black-oxide alloy steel socket head cap screws deliver exceptional engineering value in precision applications where reliability is paramount. The combination of 10-32 UNRF fine threads and Class 3A thread fit creates superior vibration resistance in machinery, automotive, and aerospace assemblies. The alloy steel construction with 170,000 psi tensile strength addresses common failure points in high-stress environments, while the black-oxide surface treatment provides essential corrosion protection without compromising dimensional accuracy. The hex socket drive design enables high-torque installation in space-constrained applications, making these fasteners ideal for precision equipment, manufacturing jigs, and critical structural components where ASTM A574 compliance ensures consistent performance.

Specification Summary & Compliance

This socket head cap screw features precision 10-32 UNRF fine threads with Class 3A thread fit for superior dimensional accuracy. The fastener is manufactured to ASTM A574 specifications governing material quality and mechanical properties. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, ensuring environmental safety and restricted substance adherence. The combination of Rockwell C37 hardness and 170,000 psi tensile strength meets rigorous industrial standards for high-performance fastening applications.