S-91286A200 3/8"-16 x 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion protection through zinc-flake coating, extending service life in harsh industrial environments
• Optimized installation efficiency with external hex drive design providing secure tool engagement and torque transmission
• Enhanced thread reliability through Class 2A thread fit ensuring consistent assembly and vibration resistance
• Maximum fastening coverage with fully threaded design offering complete engagement along the entire 1/2" length
• Proven material integrity with Rockwell C33 hardness maintaining structural stability under heavy loads
• Industry-standard compatibility with UNC coarse threads facilitating quick assembly and disassembly operations

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical engineering solutions where high tensile strength and corrosion resistance are paramount. The zinc-flake coated steel construction provides exceptional protection against environmental degradation, making these 3/8"-16 UNC fasteners ideal for heavy machinery, structural steel connections, and industrial equipment subjected to dynamic loads. The external hex drive design ensures reliable torque application during installation, while the coarse thread configuration prevents cross-threading and enables rapid assembly in manufacturing and construction applications. These fully threaded screws maintain consistent clamping force across the entire engagement length, addressing vibration-induced loosening concerns in demanding operational environments.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC thread form ensuring interchangeability and proper engagement. Complies with ASME B18.2.1 and SAE J429 specifications for Grade 8 fasteners, guaranteeing consistent quality and performance. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for hazardous substance restrictions, making these screws suitable for global industrial applications with strict regulatory requirements.