S-90124A322 3/8"-16 x 3/4" ASME B18.2.1, SAE J429 Steel Wire-Lockable Hex Head Screws

Key Features & Benefits at a Glance

• High tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure
• Black-oxide steel construction provides enhanced corrosion resistance for extended service life in industrial environments
• Grade 5 classification guarantees consistent mechanical properties and load-bearing capacity for structural applications
• Fully threaded design allows for maximum engagement and superior holding power across the entire fastener length
• Coarse UNC thread pattern enables faster installation and better performance in materials prone to stripping
• External hex drive provides secure tool engagement and high torque capability during installation
• Wire locking capability offers additional security against vibration-induced loosening in dynamic applications

Professional Applications & Engineering Value

This Grade 5 hex head screw delivers exceptional engineering value through its black-oxide steel composition and fully threaded UNC design. The combination of 120,000 psi tensile strength and Rockwell C25 hardness makes it ideal for heavy-duty industrial applications where structural integrity is paramount. The coarse thread configuration provides superior performance in softer materials and allows for quicker assembly times. The black-oxide surface treatment enhances corrosion resistance without compromising dimensional accuracy, while the external hex drive ensures reliable torque transmission during installation. These features collectively address common industrial challenges including vibration resistance, environmental durability, and installation efficiency in machinery, construction, and equipment manufacturing applications.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerance for consistent engagement and meets ASME B18.2.1 specifications where identified with SAE J429 Grade 5 requirements. The product features 3/8"-16 UNC coarse threads with right-hand direction and is manufactured to comply with RoHS 3 (2015/863/EU) environmental regulations. The dimensional specifications include a 3/4" length, 9/16" head width, and 15/64" head height for standardized compatibility across industrial applications.