S-90128A635 3/8"-16 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 under high-stress conditions, reducing the risk of fastener failure.
• Zinc-plated alloy steel construction provides superior corrosion resistance, extending service life in demanding industrial environments.
• Rockwell C37 hardness offers excellent wear resistance, maintaining thread integrity through repeated assembly and disassembly cycles.
• Class 3A thread fit delivers precise engagement with mating parts, minimizing vibration loosening and improving assembly reliability.
• 5/16" hex drive socket head allows for high-torque installation with standard tools, speeding up assembly processes.
• Partially threaded design provides optimal clamping force distribution, preventing joint slippage in critical applications.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental responsibility for global supply chains.

Professional Applications & Engineering Value

These 3/8"-16 UNC socket head cap screws are engineered to solve critical fastening challenges in heavy machinery, automotive assemblies, and industrial equipment. The zinc-plated alloy steel material combats corrosion in harsh operating conditions, while the coarse thread spacing provides rapid installation and superior holding power in soft materials or high-vibration environments. The standard socket head profile with 5/16" hex drive enables flush mounting in confined spaces where wrench clearance is limited. With partial threading and Class 3A thread fit, these fasteners deliver precise clamping force control, preventing damage to critical components and reducing maintenance downtime in production lines.

Specification Summary & Compliance

These socket head cap screws feature 3/8"-16 UNC coarse threads with Class 3A fit for superior dimensional accuracy and thread engagement. Manufacturing specifications strictly adhere to ASTM A574 standards for high-strength alloy steel socket head cap screws. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. Thread direction is right-hand with a minimum thread length of 1 1/4" and overall length of 2 3/4".