S-90275A591 5/16"-18 x 2" ASME B18.6.3 Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• High-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing applications
• Precise thread engagement with Class 2A fit UNC coarse threads ensuring consistent fastening and vibration resistance
• Optimal flush mounting with standard 82° countersink angle flat head design for smooth surface finishes
• Full-threaded design providing maximum grip length and superior holding power across the entire 2" length
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability
• Environmental regulation adherence with RoHS 3 and REACH compliance for safe, sustainable industrial use

Professional Applications & Engineering Value

These 5/16"-18 UNC flat head slotted screws deliver exceptional engineering value in industrial fastening applications where surface flushness and structural integrity are critical. The zinc-plated steel construction provides essential corrosion protection for machinery, equipment assemblies, and structural frameworks exposed to harsh operating conditions. The fully threaded coarse spacing design ensures maximum thread engagement in wood, metal, and composite materials, while the 82° countersink angle allows for seamless integration in countersunk holes without protrusion. With 60,000 psi tensile strength and standardized dimensions per ASME B18.6.3, these screws solve common industrial challenges including vibration loosening, material fatigue, and installation efficiency in manufacturing, construction, and maintenance operations.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread spacing for consistent performance. Complies with ASME B18.6.3 mechanical and dimensional specifications, ensuring interchangeability and reliability. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements for restricted substances, making them suitable for global industrial applications requiring certified components.