S-92865A581 5/16"-18 x 3/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 PSI tensile strength, ideal for high-stress industrial applications
• Superior corrosion resistance provided by zinc plating, extending service life in demanding environments
• Reliable mechanical performance ensured by Grade 5 steel and Rockwell C25 hardness for consistent durability
• Quick installation and removal with external hex drive design and fully threaded UNC coarse spacing
• Precise thread engagement through Class 2A thread fit, reducing cross-threading risks in assembly
• Broad industrial compatibility meeting ASME B18.2.1 and SAE J429 standards for quality assurance
• Environmental compliance with RoHS 3 and REACH regulations for safe global usage

Professional Applications & Engineering Value

This Grade 5 steel hex head screw delivers critical reliability in heavy machinery, structural assemblies, and equipment manufacturing where vibration resistance and high tensile strength are paramount. The zinc plating provides essential corrosion protection in industrial settings, while the UNC coarse threads and external hex drive enable rapid installation with standard tools. Engineered to prevent loosening under dynamic loads, these fully threaded screws maintain joint integrity in automotive, construction, and manufacturing applications where ASME B18.2.1 compliance ensures consistent performance and interchangeability.

Specification Summary & Compliance

This fastener features 5/16"-18 UNC coarse threads with Class 2A thread fit for precise dimensional accuracy. Manufactured to ASME B18.2.1 specifications and SAE J429 Grade 5 requirements, it delivers 120,000 PSI tensile strength and Rockwell C25 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.