S-91259A533 10-24 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional durability and wear resistance with Rockwell C32 hardness, ideal for high-stress industrial environments.
• Superior load-bearing capability thanks to 140,000 psi tensile strength and 84,000 psi minimum shear strength for reliable performance in demanding applications.
• Precise alignment and reduced assembly wear with a 1/4" shoulder diameter and standard fit, ensuring smooth rotational movement and extended component life.
• Enhanced corrosion protection from the black oxide finish, providing added resistance in various operating conditions.
• Secure and easy installation with a knurled socket head and 1/8" hex drive, allowing for firm grip and efficient torque application.
• Accurate and reliable threading with Class 3A UNC coarse threads, ensuring tight fits and reduced risk of stripping in right-hand applications.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence for global use.

Professional Applications & Engineering Value

This 10-24 UNC shoulder screw is engineered to address common industrial challenges such as misalignment and component wear in machinery. Made from alloy steel with a black oxide finish, it offers excellent strength and corrosion resistance, making it suitable for precision assemblies in automotive, aerospace, and manufacturing equipment. The 1/4" shoulder provides a stable bearing surface, reducing friction and extending the life of moving parts. With its Class 3A thread fit and coarse UNC threading, it ensures quick, secure fastening in high-vibration environments, while the knurled socket head allows for easy handling and installation, minimizing downtime in production lines.

Specification Summary & Compliance

This shoulder screw features precise dimensions, including a shoulder diameter of 1/4" with a tolerance of -0.004" to -0.002" and length of 1/4" with a tolerance of -0.005" to 0.005", ensuring consistent performance. It adheres to Class 3A thread fit for accurate UNC coarse threading and meets ASME B18.3 specifications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it is free from hazardous substances, supporting safe and sustainable industrial applications.