S-90124A329 1/2"-13 x 3/4" ASME B18.2.1, SAE J429 Steel Wire-Lockable Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with Grade 5 classification and 120,000 psi tensile strength, ensuring reliable performance in demanding applications.
• Superior corrosion resistance provided by the black-oxide steel finish, extending fastener life in various industrial environments.
• High torque transmission efficiency thanks to the external hex drive and hex head design, allowing for secure installation and removal.
• Easy and quick installation with coarse UNC threading and Class 2A thread fit, reducing assembly time and improving productivity.
• Full threading for maximum grip along the entire 3/4" length, offering consistent holding power across the fastened materials.
• Compliance with industry standards including ASME B18.2.1 and RoHS 3, ensuring quality, safety, and environmental responsibility.
• Versatile right-hand thread design suitable for standard assembly processes, making it ideal for a wide range of industrial uses.

Professional Applications & Engineering Value

This Grade 5 Black-Oxide Steel Hex Head Screw is engineered to address common industrial challenges such as vibration loosening and material fatigue. Its coarse 1/2"-13 UNC threading and Class 2A thread fit provide excellent engagement in softer materials or where quick assembly is critical, reducing the risk of cross-threading. The external hex drive ensures high torque application without slippage, ideal for heavy-duty machinery, construction equipment, and automotive assemblies. Made from robust steel with a black-oxide coating, it resists rust and wear in harsh environments, while the fully threaded design maximizes load distribution. These features make it a reliable choice for engineers seeking durable, standards-compliant fasteners that enhance structural integrity and minimize maintenance.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including Class 2A thread fit for consistent accuracy and UNC coarse threading with a 1/2"-13 size. It meets ASME B18.2.1 specifications (referencing SAE J429) for mechanical properties and is fully RoHS 3 (2015/863/EU) Compliant, ensuring it is free from hazardous substances. The manufacturing conforms to industry norms for Grade 5 strength, with a tensile strength of 120,000 psi and Rockwell C25 hardness, guaranteeing reliability in regulated applications.