S-90124A583 5/16"-18 x 1" ASME B18.2.1, SAE J429 Steel Wire-Lockable Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
• Exceptional load-bearing capacity with Grade 5 classification and 120,000 psi tensile strength for heavy-duty applications
• Reliable thread engagement through UNC coarse threading and Class 2A fit, ensuring secure fastening in various materials
• Enhanced installation efficiency with external hex drive design providing superior torque transmission and tool compatibility
• Full-threaded design offering maximum grip length and uniform stress distribution along the entire fastener
• Wire locking capability for added vibration resistance in dynamic operating conditions
• Regulatory compliance assurance meeting RoHS 3 and REACH environmental standards for global supply chain compatibility

Professional Applications & Engineering Value

These Grade 5 hex head screws deliver critical performance in demanding applications where vibration resistance and structural integrity are paramount. The zinc-plated steel construction provides essential corrosion protection for outdoor equipment, machinery assemblies, and structural frameworks exposed to environmental elements. The UNC coarse threading with Class 2A fit ensures rapid installation and reliable performance in steel, aluminum, and composite materials, while the external hex drive accommodates high torque requirements without stripping. With Rockwell C25 hardness and full threading, these fasteners maintain clamping force under dynamic loads, making them ideal for automotive components, industrial machinery, and construction applications where vibration-induced loosening is a concern.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread specifications (5/16"-18). Complies with ASME B18.2.1 and SAE J429 Grade 5 mechanical requirements, ensuring interchangeability and reliability across industrial applications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards for environmental safety and global market acceptance. Features include 1" length, fully threaded design, 1/2" head width, and right-hand thread direction for standard industrial use.