S-96126A122 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• Exceptional strength and durability offering 70,000 psi tensile strength and Rockwell B79 hardness for reliable, long-term performance.
• Precise alignment and reduced wear thanks to the 1/8" shoulder diameter with tight tolerances (±0.002") for accurate component positioning.
• Easy installation and removal using a standard 5/64" hex drive, ensuring efficient assembly in confined spaces.
• Wide compatibility with UNC coarse threads and Class 2A fit, providing secure fastening in various applications.
• Environmental and regulatory compliance meeting RoHS 3 and REACH standards for safe, sustainable use in global markets.
• Smooth, low-profile socket head with a 0.25" diameter for a flush finish and reduced risk of snagging.

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw in 316 stainless steel is engineered to address critical alignment and corrosion challenges in precision assemblies. The passivated finish enhances resistance to chemicals and moisture, making it suitable for industries like aerospace, medical devices, and automation where reliability is paramount. Its precise shoulder diameter and tight tolerances ensure minimal play, reducing vibration and wear in rotating parts or guiding mechanisms. The socket head design with a hex drive allows for secure torque application in compact spaces, streamlining maintenance and improving operational efficiency. By integrating high tensile strength and compliance with international standards, this screw delivers consistent performance in demanding industrial applications, from machinery fixtures to electronic enclosures.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent engagement and ease of assembly. Dimensional accuracy is maintained with shoulder diameter tolerance of -0.001" to 0" and shoulder length tolerance of 0" to 0.002", ensuring precision in manufacturing. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industrial use.