S-91264A251 10-24 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Tensile & Shear Strength – Withstands up to 140,000 psi tensile and 84,000 psi shear loads, providing reliable performance in high-stress industrial applications.
• Secure Vibration-Resistant Locking – Integrated nylon pellet thread locker maintains fastener integrity across a wide temperature range from -50° to 250° F, preventing loosening under dynamic loads.
• Precision Shoulder & Thread Fit – Class 3A thread fit and controlled shoulder diameter/length tolerances ensure accurate alignment and consistent assembly in precision machinery.
• Durable Corrosion-Resistant Finish – Black oxide coating enhances surface protection while maintaining dimensional stability in demanding environments.
• Optimized Drive & Installation – Socket head with hex drive design allows for high-torque installation and removal in confined spaces using standard tools.
• Standardized Compliance – Manufactured to ASME B18.3 specifications with alloy steel construction and Rockwell C32 hardness for guaranteed mechanical properties.
• Environmental Regulation Compliance – Meets RoHS 3 and REACH standards for safe use in regulated industries and international markets.

Professional Applications & Engineering Value

Engineered for precision alignment and rotational motion control, these shoulder screws provide critical spacing and pivot functions in industrial machinery, automation systems, and precision equipment. The alloy steel construction with Rockwell C32 hardness ensures dimensional stability under load, while the 10-24 UNC coarse thread with Class 3A fit delivers secure fastening with consistent engagement. The black oxide finish provides corrosion resistance without compromising dimensional accuracy, making these fasteners ideal for applications requiring repeated assembly/disassembly. The integrated nylon pellet thread locker addresses vibration-induced loosening in rotating assemblies, maintaining clamp force across the specified temperature range from -50° to 250° F.

Specification Summary & Compliance

This shoulder screw features precision Class 3A thread fit with 10-24 UNC coarse thread and controlled shoulder tolerances (diameter: -0.004" to -0.002", length: -0.005" to 0.005"). Manufactured to ASME B18.3 specifications using ASTM A574 alloy steel with Rockwell C32 hardness. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.