S-90128A126 8-32 x 1 1/8" 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 provided by the zinc plating protects against rust and environmental degradation, extending service life in harsh industrial settings.
• Precise Class 3A thread fit guarantees tight, secure fastening with minimal play, enhancing assembly accuracy and vibration resistance.
• High hardness (Rockwell C37) offers excellent wear resistance and durability, maintaining thread integrity through repeated use and disassembly.
• Partially threaded design allows for controlled clamping force and easier alignment in assemblies where full threading is not required.
• Standard hex drive (9/64") enables easy installation and removal with common tools, improving efficiency in maintenance and production workflows.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality, environmental safety, and regulatory acceptance for global industrial use.

Professional Applications & Engineering Value

These 8-32 UNC thread socket head cap screws are engineered to address critical challenges in industrial assembly, such as vibration loosening and material fatigue. The zinc-plated alloy steel construction provides a robust barrier against moisture and chemicals, making them ideal for machinery, automotive, and outdoor equipment where corrosion resistance is paramount. The coarse thread design ensures quick installation and strong holding power in softer materials or applications requiring frequent adjustments. With a partially threaded shank, they offer precise clamping without over-tightening, reducing stress concentrations. The Class 3A fit and high tensile strength deliver consistent performance in high-load scenarios, from precision instruments to heavy-duty frames, ensuring long-term reliability and reduced maintenance costs.

Specification Summary & Compliance

This product adheres to UNC coarse thread standards with a Class 3A thread fit for precise dimensional accuracy. It meets ASTM A574 specifications for high-strength socket head cap screws, ensuring consistent manufacturing quality. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms the absence of hazardous substances, supporting environmental and safety regulations. The screw features a right-hand thread direction, 1 1/8" length, and 9/64" hex drive, aligning with industry standards for reliable fastening solutions.