S-97595A312 5/16"-18 x 1 1/4" ASME B18.3 Brass Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from brass material, ideal for harsh industrial environments and outdoor applications
• Exceptional thread reliability with Class 3A thread fit ensuring precise, vibration-resistant fastening connections
• High mechanical strength with 50,000 PSI tensile strength and Rockwell B55 hardness for heavy-duty applications
• Optimized drive efficiency through 3/16" hex drive design providing secure tool engagement and reduced cam-out
• Flush mounting capability with 82° countersink angle and standard flat head profile for seamless surface integration
• Full thread engagement along the entire 1-1/4" length for maximum holding power in various material thicknesses
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations (RoHS 3 & REACH)

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 5/16"-18 UNC brass flat head screws deliver exceptional performance where corrosion resistance and mechanical reliability are critical. The brass construction provides natural resistance to rust and galvanic corrosion, making them ideal for marine applications, electrical enclosures, and plumbing systems. The Class 3A thread fit ensures precise engagement with mating components, reducing the risk of cross-threading and providing vibration-resistant connections in machinery and equipment. The 82° countersink angle and flat head design allow for flush mounting in precision assemblies, while the 3/16" hex drive offers superior torque transmission compared to slotted alternatives. These heavy-duty fasteners are particularly valuable in applications requiring repeated disassembly and reassembly, where thread integrity and corrosion resistance are paramount for long-term performance.

Specification Summary & Compliance

This 5/16"-18 UNC brass flat head screw features precision Class 3A thread fit with coarse thread spacing for rapid installation and superior holding power. Manufacturing complies with ASME B18.3 specifications ensuring dimensional accuracy and performance reliability. The product meets stringent environmental standards including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, confirming adherence to hazardous substance restrictions. Thread specifications maintain UNC coarse thread standards with full threading along the 1-1/4" length, providing consistent engagement depth across various applications.