S-94383A430 3/8"-16 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 140,000 psi tensile strength and 84,000 psi shear strength for reliable performance in demanding applications
• Superior corrosion resistance thanks to the black oxide finish that protects against rust and extends service life
• Precision thread engagement with Class 3A fit and UNC coarse threads ensuring secure fastening and vibration resistance
• Enhanced durability from Rockwell C32 hardness alloy steel construction that withstands heavy wear and impact
• Easy installation and removal with 1/4" hex drive socket head and knurled texture for improved grip during torque application
• Accurate component alignment through the 1/2" shoulder diameter with tight tolerances for precise mounting in assemblies
• Full regulatory compliance meeting ASME B18.3, ASTM A574, RoHS 3, and REACH standards for guaranteed quality and safety

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw delivers critical engineering solutions where precise component positioning and high strength are paramount. The alloy steel construction with black oxide finish provides excellent corrosion resistance in industrial environments, while the Class 3A thread fit ensures vibration-resistant connections in machinery and equipment. The 1/2" shoulder diameter with controlled tolerances allows for accurate bearing surfaces and pivot points in assemblies, eliminating misalignment issues. Ideal for precision applications in automation systems, rotating machinery, and mechanical linkages, this socket head shoulder screw combines robust 140,000 psi tensile strength with reliable mounting capabilities that reduce maintenance needs and extend equipment lifespan.

Specification Summary & Compliance

This shoulder screw maintains Class 3A thread fit with UNC coarse threading (3/8"-16) and features precise shoulder dimensions (1/2" diameter with -0.004" to -0.002" tolerance). Manufactured to ASME B18.3 specifications using ASTM A574 alloy steel, it delivers consistent performance across industrial applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability for global supply chain requirements.