S-91259A102 10-24 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional durability and wear resistance with alloy steel construction and Rockwell C32 hardness, ensuring long service life in demanding applications.
• Superior corrosion protection provided by the black oxide finish, reducing maintenance needs and extending component lifespan.
• High load-bearing capacity with 140,000 psi tensile strength and 84,000 psi minimum shear strength for reliable performance under stress.
• Precise alignment and reduced wear due to the Class 3A thread fit and standard shoulder fit, minimizing play and vibration.
• Easy installation and removal with the hex socket drive and knurled head, allowing for secure tool grip and efficient assembly.
• Versatile coarse UNC threading enabling quick fastening and resistance to loosening in high-vibration environments.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address critical industrial challenges, such as misalignment and component wear in machinery. The black oxide finish enhances corrosion resistance, making it ideal for environments exposed to moisture or chemicals. With a 10-24 UNC coarse thread and Class 3A thread fit, it provides secure, vibration-resistant fastening in applications like pivots, axles, and rotating assemblies. The precise shoulder diameter and length tolerances ensure accurate positioning, reducing downtime and maintenance costs in automotive, aerospace, and heavy equipment sectors. Its high tensile and shear strength supports heavy-duty operations, delivering reliability where failure is not an option.

Specification Summary & Compliance

This shoulder screw adheres to tight dimensional tolerances, including a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005", with a Class 3A thread fit for precision. It meets ASME B18.3 specifications and is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and quality assurance.