S-90124A319 5/16"-18 x 1" ASME B18.2.1, SAE J429 Steel Wire-Lockable Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure
• Durable black-oxide coating provides corrosion resistance and extends service life in demanding industrial environments
• Grade 5 steel construction with Rockwell C25 hardness offers superior mechanical strength and wear resistance
• Fully threaded UNC coarse threads with Class 2A fit enable quick installation and secure fastening in various materials
• External hex head design allows for high-torque application using standard tools, improving assembly efficiency
• Wire locking capability provides additional vibration resistance in dynamic applications
• Compliance with ASME B18.2.1/SAE J429 standards guarantees consistent quality and interchangeability

Professional Applications & Engineering Value

These Grade 5 hex head screws deliver exceptional engineering value in demanding industrial applications where reliability is paramount. The combination of black-oxide steel construction and 120,000 psi tensile strength makes them ideal for heavy machinery, construction equipment, and automotive assemblies where vibration resistance and durability are critical. The fully threaded UNC coarse thread design ensures maximum grip length and superior holding power in both metal and composite materials. With Class 2A thread fit precision, these screws provide consistent engagement and reduced installation torque variability. The external hex drive configuration enables high-torque applications while the wire locking feature maintains fastener integrity in high-vibration environments, making them particularly valuable for equipment subjected to dynamic loads and thermal cycling.

Specification Summary & Compliance

This 5/16"-18 UNC hex head screw features precise Class 2A thread fit tolerances with coarse thread spacing for optimal performance. Manufactured to meet ASME B18.2.1 specifications and SAE J429 Grade 5 requirements, ensuring dimensional accuracy and mechanical consistency. The fastener is RoHS 3 (2015/863/EU) compliant for environmental safety and contains no restricted hazardous substances. With Rockwell C25 hardness and standardized dimensions, these screws provide reliable performance across industrial applications while maintaining full regulatory compliance.