S-91259A163 6-32 ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Tensile and Shear Performance: With 140,000 psi tensile strength and 84,000 psi minimum shear strength, this screw provides reliable load-bearing capacity for high-stress assemblies, reducing the risk of fastener failure.
• Superior Corrosion Resistance: The black oxide finish offers enhanced protection against rust and corrosion, extending the screw's service life in harsh industrial environments.
• Precision Thread Fit for Secure Fastening: Class 3A thread fit ensures tight, vibration-resistant connections, minimizing loosening in dynamic applications and improving overall assembly integrity.
• High Hardness for Durability: Rockwell C32 hardness provides excellent wear resistance, maintaining dimensional stability and thread integrity through repeated use and high-torque installations.
• Easy Installation with Hex Drive: The 3/32" hex socket drive allows for efficient, high-torque installation using standard tools, speeding up assembly processes and reducing labor time.
• Coarse Threading for Quick Assembly: 6-32 UNC coarse threads enable faster engagement and disassembly compared to fine threads, ideal for applications requiring frequent maintenance or adjustments.
• Regulatory Compliance for Global Use: Meets ASTM A574 specifications and is RoHS 3 and REACH compliant, ensuring suitability for international markets and environmentally conscious manufacturing.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The 6-32 UNC coarse thread design ensures rapid, secure fastening in components subject to vibration, while the black oxide finish provides essential corrosion protection in humid or chemically exposed environments. The socket head with hex drive facilitates easy access in confined spaces, reducing installation time and tool slippage risks. With a shoulder diameter of 5/32" and tight tolerances, it offers precise alignment for rotating parts like bearings and pulleys, minimizing wear and extending component life. Ideal for use in robotics, automotive assemblies, and industrial fixtures, this screw delivers consistent performance where high tensile strength and shear resistance are paramount, ensuring long-term reliability in demanding applications.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit for superior precision and UNC coarse threading standards. Manufacturing complies with ASTM A574 specifications, ensuring consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting stringent environmental and safety regulations for global industrial use.