S-91268A412 7/16"-14 x 5" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength for demanding applications with Grade 8 classification and 150,000 PSI tensile strength, ensuring reliable performance under high stress
• Superior durability and wear resistance thanks to Rockwell C33 hardness, providing long service life in harsh industrial environments
• Secure fastening with precise thread fit through Class 2A UNC coarse threads, offering excellent engagement and vibration resistance
• Easy installation and removal with external hex drive and 5/8" head width, allowing for standard wrench compatibility
• Optimized load distribution with partial threading design, reducing stress concentration and improving joint integrity
• Compliance with industry standards including ASME B18.2.1 and SAE J429, guaranteeing consistent quality and interchangeability
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical performance in heavy-duty applications where failure is not an option. The steel construction combined with 150,000 PSI tensile strength and Rockwell C33 hardness provides exceptional resistance to shear forces and fatigue, making them ideal for industrial machinery, construction equipment, and automotive assemblies. The 7/16"-14 UNC coarse thread design ensures rapid installation and superior holding power in structural components, while the partial threading minimizes thread damage during repeated disassembly. Engineered to withstand extreme vibration and dynamic loads, these external hex drive fasteners offer reliable torque transmission and maintain clamping force in critical joints, reducing maintenance downtime and enhancing operational safety.

Specification Summary & Compliance

This 5" length hex head screw features precise Class 2A thread fit with UNC coarse threading (7/16"-14) and partial threading up to 1 1/8" minimum thread length. Manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, providing safe and sustainable fastening solutions for global industrial applications.