S-90344A157 10-24 x 1 1/4" ASTM A574 Socket Head Screws with Flat Washer

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 finish on alloy steel, extending service life in harsh or humid industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening over time.
• Integrated flat washer distributes clamping load evenly, preventing surface damage and maintaining joint integrity.
• Hex socket drive design allows for high-torque installation with standard tools, facilitating efficient assembly and disassembly.
• Coarse UNC threads enable quicker installation and better performance in materials prone to stripping or where debris is present.
• Compliance with ASTM A574 and environmental standards (RoHS 3, REACH) ensures consistent quality and safe use across regulated industries.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical fastening challenges in heavy machinery, automotive, and construction sectors. Its 10-24 UNC coarse thread and Class 3A fit provide superior grip in soft metals or plastics, reducing cross-threading risks. The partially threaded design concentrates strength where needed, while the integrated flat washer prevents embedding and distributes stress over a wider area—ideal for repetitive load cycles. With a Rockwell C39 hardness and corrosion-resistant coating, it withstands abrasive conditions and moisture, ensuring long-term reliability in assembly lines, equipment frames, and structural supports where vibration and environmental factors are concerns.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including Class 3A thread fit for tight tolerance assemblies and UNC coarse threading (10-24 size). Manufacturing follows ASTM A574 specifications for high-strength socket head cap screws, ensuring consistent material properties and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming the absence of restricted substances for safe use in global markets.