S-91259A169 10-24 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 140,000 psi tensile strength and 84,000 psi shear strength for reliable performance in demanding applications.
• Superior wear and corrosion resistance thanks to the black oxide finish, extending service life in harsh industrial environments.
• Precise alignment and smooth rotation ensured by the Class 3A thread fit and standard shoulder fit, reducing assembly errors and improving operational efficiency.
• Easy installation and removal with a hex drive and knurled head design, providing a secure grip and reducing tool slippage during maintenance.
• High durability and material integrity from alloy steel construction and Rockwell C32 hardness, minimizing deformation under stress.
• Broad compatibility with UNC coarse threads and right-hand direction, facilitating quick integration into various machinery and equipment.
• Regulatory compliance assurance meeting ASME B18.3 standards, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address critical challenges in precision assemblies, such as misalignment and component wear. The black oxide finish enhances corrosion resistance, making it ideal for automotive, aerospace, and heavy machinery applications where exposure to moisture and chemicals is common. With a 10-24 UNC coarse thread and Class 3A fit, it ensures tight tolerances and reliable fastening in high-vibration environments. The knurled head and hex drive allow for effortless installation, reducing downtime in production lines. By combining high tensile strength and shear strength, this screw supports robust performance in pivots, bearings, and guides, delivering long-term engineering value and operational efficiency.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for superior accuracy and a shoulder diameter tolerance of -0.004" to -0.002". It conforms to ASME B18.3 specifications and is manufactured from alloy steel per ASTM A574. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it meets environmental and safety regulations for industrial use.