S-91251A192 8-32 x 3/8" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide coating extends service life and maintains integrity in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening over time.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use and installation.
• Standard hex drive design allows for easy installation with common tools, streamlining assembly processes and reducing labor time.
• Full threading along the 3/8" length ensures maximum grip and uniform clamping force across the entire fastened joint.
• Compliance with major regulations including RoHS 3 and REACH guarantees environmental safety and broad acceptability across regulated industries.

Professional Applications & Engineering Value

These socket head cap screws with 8-32 UNC coarse threads are engineered to address critical challenges in precision machinery, automotive assemblies, and heavy equipment where vibration resistance and high clamp loads are paramount. The black-oxide alloy steel construction combats corrosion while the Class 3A thread fit ensures minimal backlash in dynamic applications. With a 170,000 psi tensile strength and Rockwell C37 hardness, they prevent stripping and deformation during torque application, making them ideal for high-stress industrial applications requiring repeatable disassembly and reliable performance under cyclic loading conditions.

Specification Summary & Compliance

This socket head cap screw features precision 8-32 UNC coarse threads with Class 3A fit for superior thread engagement. Manufactured from alloy steel to ASTM A574 specifications, it maintains dimensional accuracy across all critical parameters including head diameter (0.27") and drive size (9/64"). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility while meeting international industrial standards for quality and safety.