S-91223A227 5/16"-18 x 1 1/2" 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and chemical exposure
• Exceptional strength and durability from 70,000 psi tensile strength and Rockwell B70 hardness, ensuring reliable performance under high stress
• Precise and secure fastening with Class 2A thread fit and UNC coarse threads, providing consistent engagement and vibration resistance
• Space-saving ultra-low profile head allows installation in confined areas while maintaining a 5/32" hex drive for easy torque application
• Full thread coverage along the 1 1/2" length offers maximum adjustability and holding power in various material thicknesses
• Regulatory compliance assurance with RoHS 3 and REACH standards, meeting international environmental and safety requirements
• Right-hand coarse threading enables quick assembly and disassembly, reducing installation time in industrial settings

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this 316 Stainless Steel socket head cap screw delivers critical performance where corrosion resistance and mechanical strength are paramount. The ultra-low profile head design solves space constraint issues in compact machinery, enclosures, and precision equipment, while the 5/16"-18 UNC coarse thread ensures rapid installation and superior vibration resistance in dynamic environments. With a 70,000 psi tensile strength and Rockwell B70 hardness, it withstands heavy loads and repetitive stress in manufacturing, marine, chemical processing, and aerospace assemblies. The combination of Class 2A thread fit and full threading provides consistent clamping force, reducing the risk of loosening and maintenance downtime in critical fastening joints.

Specification Summary & Compliance

This socket head cap screw maintains precise dimensional tolerances, including a head diameter tolerance of -0.005" to 0.005" and Class 2A thread fit per UNC standards for reliable interchangeability. Manufactured in accordance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it ensures compliance with hazardous substance restrictions and environmental safety protocols. The inch system measurements and coarse thread spacing adhere to industry-accepted specifications for consistent performance in professional applications.