S-90357A025 5/16"-18 x 1 1/2" Alloy Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
• Precise Class 3A thread fit ensures reliable engagement and vibration resistance in critical assemblies
• Exceptional 140,000 psi tensile strength provides high load-bearing capacity for heavy-duty applications
• Ultra-low socket head profile enables installation in confined spaces while maintaining full hex drive engagement
• Rockwell C32 hardness rating maintains thread integrity and prevents stripping during repeated use
• Comprehensive regulatory compliance with RoHS 3 and REACH standards for global manufacturing acceptance
• Coarse UNC threading facilitates quick assembly and reduces cross-threading risks in production environments

Professional Applications & Engineering Value

These black-oxide alloy steel socket head cap screws deliver critical performance advantages in precision machinery, automotive assemblies, and industrial equipment where space constraints and vibration resistance are paramount. The ultra-low profile head design combined with Class 3A thread fit addresses common challenges of fastener failure in high-stress applications, while the coarse UNC threading ensures rapid installation without compromising joint integrity. The 5/32" hex drive provides secure tool engagement, preventing cam-out during torque application. Engineered for industrial screw applications requiring both dimensional precision and chemical resistance, these fasteners maintain consistent performance in environments exposed to oils, moisture, and temperature variations.

Specification Summary & Compliance

Manufactured to precise dimensional standards with length tolerance of -0.005" to 0.005", these socket head cap screws feature 5/16"-18 UNC coarse threads with Class 3A fit for superior thread engagement. The fasteners comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for global industrial applications. The combination of Rockwell C32 hardness and 140,000 psi tensile strength provides reliable mechanical performance across demanding engineering applications.