S-90344A155 3/8"-24 x 1 1/2" ASTM A574 Socket Head Screws with Flat Washer

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 170,000 psi tensile strength and Rockwell C39 hardness for demanding industrial applications
• Precise thread engagement with Class 3A fine thread fit ensuring vibration resistance and reliable fastening in critical assemblies
• Integrated load distribution system featuring a black-oxide steel flat washer (13/16" OD) that prevents surface damage and maintains joint integrity
• Superior corrosion resistance through black-oxide treatment on both alloy steel screw and washer for extended service life in harsh environments
• Optimized drive efficiency with 5/16" hex socket design providing high torque transmission and reduced tool slippage
• Full-threaded construction enabling maximum grip length and uniform stress distribution along the entire fastener
• Regulatory compliance assurance meeting ASTM A574, RoHS 3, and REACH standards for global industrial acceptance

Professional Applications & Engineering Value

Engineered for precision machinery and heavy-duty equipment, these socket head cap screws solve critical fastening challenges where vibration resistance and exact alignment are paramount. The black-oxide alloy steel construction combined with Class 3A UNF fine threads maintains clamping force under dynamic loads, preventing loosening in automotive assemblies, industrial robots, and precision tooling. The integrated flat washer distributes bearing stress across wider surfaces, protecting soft materials while the fully threaded design allows adjustable positioning in threaded holes and clearance applications. This combination addresses common failure points in high-vibration environments while providing consistent performance in automated manufacturing systems.

Specification Summary & Compliance

Manufactured to precision thread standards with Class 3A fit for superior engagement in UNF fine-thread applications. The 1½" length and 3/8"-24 thread size maintain strict dimensional accuracy per industrial requirements. Compliance with ASTM A574 specification ensures consistent material properties and manufacturing quality. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions, making these fasteners suitable for global supply chains and regulated industries.