S-91259A173 10-32 ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance – Black Oxide finish provides reliable protection against rust and wear in demanding industrial environments.
• Superior Tensile & Shear Strength – With 140,000 psi tensile and 84,000 psi minimum shear strength, ensures secure, long-lasting fastening under high-stress conditions.
• Precision Thread Fit & Stability – Class 3A thread fit and 10-32 UNF fine thread design offer excellent vibration resistance and accurate alignment.
• High Hardness for Wear Resistance – Rockwell C32 hardness maintains structural integrity and reduces deformation during repeated use.
• Secure Hex Drive & Knurled Head – Hex drive (1/8") and knurled head enable easy, slip-resistant installation and removal with standard tools.
• Accurate Shoulder Dimensions – 1/4" shoulder diameter and 3/4" shoulder length with tight tolerances ensure precise component positioning and smooth rotation.
• Compliance with Industry Standards – Meets ASTM A574, RoHS 3, and REACH regulations, guaranteeing safety and environmental responsibility.

Professional Applications & Engineering Value

This Alloy Steel Shoulder Screw is engineered to address critical alignment and load-bearing challenges in machinery, automation, and precision assemblies. The 10-32 UNF fine thread and Class 3A fit minimize loosening under vibration, while the Black Oxide finish enhances corrosion resistance in humid or abrasive settings. The precisely machined shoulder (1/4" diameter, 3/4" length) serves as a reliable pivot or spacer, reducing wear on moving parts. Ideal for robotics, conveyor systems, and fixture designs, it combines high tensile strength (140,000 psi) with consistent performance, streamlining maintenance and improving equipment uptime in industrial applications.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit and UNF thread standards, with shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" for precise assembly. Manufactured per ASTM A574 specifications, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial sectors.