S-90044A123 1/4"-20 x 1 1/2" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish prolongs service life and maintains integrity in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening over time.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use and adjustments.
• Fully threaded design allows for consistent clamping force along the entire length, ideal for applications requiring uniform load distribution.
• Hex socket drive enables easy installation with standard tools, reducing assembly time and improving efficiency in tight spaces.
• Compliance with ASTM A574 guarantees material quality and manufacturing consistency, ensuring reliability for critical engineering projects.

Professional Applications & Engineering Value

These black-oxide alloy steel socket head cap screws are engineered to address common industrial challenges, such as vibration-induced loosening and environmental corrosion. The coarse UNRC thread design facilitates quick assembly in materials like cast iron or soft metals, while the Class 3A thread fit ensures minimal backlash for precision machinery and equipment. With a high tensile strength of 170,000 psi, they provide robust fastening solutions for heavy-duty applications, including automotive assemblies, industrial machinery, and construction equipment. The black-oxide surface treatment adds a protective layer that resists rust and wear, extending the screw's lifespan in humid or abrasive conditions. This combination of material durability and thread precision makes them ideal for B2B procurement where reliability and compliance with standards like ASTM A574 are critical.

Specification Summary & Compliance

This socket head cap screw features a 1/4"-20 coarse thread with a Class 3A thread fit for high precision, adhering to UNRC standards. Manufactured from alloy steel with a black-oxide finish, it meets ASTM A574 specifications for material quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial markets.