S-91286A641 7/16"-14 x 1 1/4" 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 demanding industrial applications
• Superior corrosion protection through zinc-flake coating that withstands harsh environmental conditions
• Reliable mechanical performance backed by Rockwell C33 hardness for consistent durability
• Optimized installation efficiency with external hex drive design for secure torque application
• Precision thread engagement with Class 2A fit and coarse UNC threading for vibration resistance
• Full-length threading capability providing maximum grip strength across the entire fastener length
• Regulatory compliance assurance meeting ASME B18.2.1 and SAE J429 standards for quality verification

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical performance in heavy machinery, structural steel connections, and industrial equipment where high tensile strength and corrosion resistance are paramount. The combination of steel material with zinc-flake coating provides exceptional protection against rust and chemical exposure in demanding environments. The 7/16"-14 UNC coarse threading with Class 2A fit ensures reliable engagement in various materials while resisting vibration-induced loosening. The external hex drive design facilitates efficient installation with standard tools, making these fully threaded screws ideal for critical assembly applications requiring maximum clamping force and durability.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread spacing for consistent performance. Complies with ASME B18.2.1 and SAE J429 specifications for Grade 8 fasteners. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for hazardous substance restrictions.