S-90969A370 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability – Alloy steel construction with black oxide finish provides superior corrosion resistance for long-lasting performance in demanding industrial environments.
• Precise Alignment & Stability – Knurled head and Class 3A thread fit ensure secure, vibration-resistant connections, minimizing loosening in high-stress applications.
• High Tensile Strength – Rated at 140,000 psi tensile strength and Rockwell C30 hardness for reliable load-bearing capacity and resistance to deformation.
• Space-Saving Design – Ultra-low socket head profile allows installation in tight spaces without compromising drive engagement or torque application.
• Easy Installation & Maintenance – Hex socket drive (1/4") and coarse UNC threading enable quick assembly and disassembly, reducing labor time and tool wear.
• Consistent Shoulder Dimensions – Tight tolerances on shoulder diameter and length (±0.005") ensure repeatable positioning and smooth rotational movement in pivoting or guiding applications.
• Regulatory Compliance – Meets RoHS 3 and REACH standards, ensuring environmental safety and suitability for global industrial supply chains.

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and load distribution challenges in precision machinery. The alloy steel core, combined with a black oxide finish, resists wear and environmental degradation, making it ideal for automotive jigs, conveyor systems, and robotic arms where repeated motion and high shear forces are common. The knurled head enhances grip during manual adjustments, while the ultra-low profile socket head allows flush mounting in compact assemblies. With a Class 3A thread fit and coarse threading, it ensures rapid installation and reliable clamping force, reducing assembly errors and maintenance downtime in industrial fastener applications.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 3A thread fit for precise, secure fastening. Key dimensional tolerances include shoulder diameter (-0.004" to -0.002") and shoulder length (-0.005" to 0.005") to ensure consistent performance. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing it is free of restricted hazardous substances and suitable for use in regulated industries.