S-92012A507 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With 140,000 psi tensile strength, this shoulder screw provides reliable load-bearing capacity for heavy-duty industrial applications.
• Corrosion-Resistant Black Oxide Finish – Enhances durability and provides a protective layer against rust and wear in harsh operating environments.
• Precise Shoulder Alignment – The 1/8" shoulder diameter and 7/8" shoulder length with tight tolerances ensure accurate component positioning and reduced assembly vibration.
• High-Strength Alloy Steel Construction – Offers Rockwell C32 hardness for long-lasting performance under repetitive stress and mechanical loads.
• Easy Hex Drive Installation – The 5/64" hex socket head allows for secure, tool-friendly fastening in confined spaces.
• Standard UNC Coarse Threads – Class 2A thread fit ensures smooth engagement and consistent fastening in a variety of materials.
• Compliance with Environmental Standards – RoHS 3 and REACH compliant, meeting international regulations for safe and sustainable use.

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery, automation systems, and precision equipment. The alloy steel material, combined with a black oxide finish, resists corrosion and wear, extending service life in demanding conditions. The precisely machined shoulder diameter and length provide stable bearing surfaces for rotating parts, reducing misalignment and minimizing maintenance downtime. With its coarse thread design and hex drive, it ensures quick, secure installation in assemblies requiring repeated adjustments. Ideal for use in robotics, conveyor systems, and electronic enclosures, this screw delivers consistent performance where exact tolerances and high tensile strength are essential.

Specification Summary & Compliance

The screw features a Class 2A thread fit per UNC standards, ensuring dimensional accuracy and compatibility. Shoulder dimensions include a diameter of 1/8" with a tolerance of -0.001" to 0" and a length of 7/8" with a tolerance of 0" to 0.002" for precise fit. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial components.