S-91259A462 10-24 ASME B18.3, ASTM A108 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Black oxide finish provides superior protection against rust and wear in demanding industrial environments.
• Exceptional Strength for Heavy-Duty Use: Made from alloy steel with a 140,000 psi tensile strength and Rockwell C32 hardness to withstand high stress and shock loads.
• Precision Fit & Reliable Alignment: Class 3A thread fit ensures tight, secure fastening with minimal backlash for accurate assembly.
• Secure & Easy Installation: Hex socket drive and knurled head offer excellent grip and torque application, reducing the risk of tool slippage.
• Optimized for Standard Components: 10-24 UNC coarse thread and 3/8" shoulder length provide versatile compatibility with various machinery and fixtures.
• Regulatory Compliance & Safety: Meets ASME B18.3, RoHS 3, and REACH standards, ensuring environmental safety and material reliability.
• Accurate Shoulder Dimensions: Tight tolerances on shoulder diameter and length (-0.004" to -0.002" and -0.005" to 0.005") guarantee consistent performance in precision applications.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address critical challenges in industrial assembly and precision machinery. The black oxide finish significantly enhances corrosion resistance, making it ideal for harsh environments where moisture and chemicals are present. Its 10-24 UNC coarse thread and Class 3A fit ensure a secure, vibration-resistant connection, reducing maintenance needs in heavy-duty applications like automotive jigs, conveyor systems, and robotic arms. The 3/8" shoulder length provides a precise pivot or bearing surface, facilitating accurate alignment of moving parts. Combined with a hex socket drive and knurled head, it allows for efficient installation and removal, saving time and labor in high-volume production settings.

Specification Summary & Compliance

This shoulder screw adheres to strict dimensional standards, including Class 3A thread fit and shoulder tolerances (diameter: -0.004" to -0.002"; length: -0.005" to 0.005"). It conforms to ASME B18.3 specifications for consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use.