S-90124A315 1/4"-20 x 1 1/4" 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 demanding applications, reducing the risk of fastener failure.
• Black-oxide steel construction provides corrosion resistance and durability, extending service life in harsh industrial environments.
• Grade 5 classification guarantees consistent quality and mechanical properties, ideal for heavy-duty fastening needs.
• Partially threaded UNC coarse thread design allows for easier alignment and faster assembly, saving time during installation.
• External hex drive with wire locking offers secure, tool-friendly engagement and prevents loosening under vibration.
• Compliance with ASME B18.2.1 and RoHS 3 ensures adherence to industry standards and environmental regulations, providing peace of mind for regulated projects.
• Rockwell C25 hardness enhances wear resistance, maintaining integrity through repeated use and high-stress conditions.

Professional Applications & Engineering Value

These Grade 5 black-oxide steel hex head screws are engineered to address common industrial challenges, such as vibration-induced loosening and corrosion in heavy machinery. The partially threaded 1/4"-20 UNC coarse thread simplifies alignment in coarse-grained materials, while the external hex drive ensures efficient torque application with standard tools. Ideal for construction, automotive, and manufacturing sectors, these screws provide a robust fastening solution that withstands high tensile loads and harsh conditions, thanks to their 120,000 psi tensile strength and protective black-oxide finish. By meeting ASME B18.2.1 standards, they deliver reliability in critical assemblies, minimizing downtime and maintenance costs.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy, ensuring consistent performance. It complies with ASME B18.2.1 (referencing SAE J429) for mechanical and dimensional standards, and is RoHS 3 (2015/863/EU) compliant, adhering to environmental regulations for hazardous substance restrictions.