S-91257A696 7/16"-14 x 9" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with 150,000 psi tensile strength for critical structural applications
• Enhanced corrosion resistance through zinc yellow-chromate plating in harsh industrial environments
• Superior hardness and durability with Rockwell C33 rating for extended service life
• Reliable thread engagement with Class 2A fit UNC coarse threads for faster assembly
• Optimized torque transmission through external hex drive design for secure tightening
• Versatile partial threading allowing both clamping and alignment functions
• Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver exceptional performance in demanding industrial applications where failure is not an option. The steel construction combined with zinc yellow-chromate plating provides superior protection against corrosion in outdoor or chemically aggressive environments. The UNC coarse thread pattern ensures rapid installation and reliable performance in vibration-prone applications, while the partial threading design offers flexibility for both clamping and alignment functions. Engineered to withstand extreme mechanical stress, these heavy-duty hex bolts are ideal for construction equipment, machinery frames, and structural assemblies where 150,000 psi tensile strength is essential for safety and reliability.

Specification Summary & Compliance

This 7/16"-14 hex head screw features precise Class 2A thread fit tolerances and UNC coarse threading standards. The fastener complies with ASME B18.2.1 dimensional specifications and SAE J429 material standards, ensuring consistent quality and performance. Manufactured from high-strength steel with Rockwell C33 hardness and zinc yellow-chromate plating finish, these industrial-grade screws meet rigorous industry requirements for heavy-duty applications.