S-97832A268 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Precise component alignment ensured by the 3/4" shoulder diameter with tight tolerances for reduced assembly play.
• High-strength performance delivering 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications.
• Superior thread reliability with Class 3A fit and coarse UNC threads for secure, vibration-resistant fastening.
• Easy installation and removal using the 3/8" hex drive and knurled head for enhanced grip and torque application.
• Long-term durability supported by Rockwell B55 hardness, resisting wear and deformation under load.
• Regulatory compliance and safety meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental responsibility.

Professional Applications & Engineering Value

This 1/2"-13 UNC shoulder screw is engineered to address critical alignment and strength challenges in industrial applications. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it suitable for machinery, automotive assemblies, and equipment exposed to moisture or chemicals. The 3/4" shoulder diameter with precise tolerances ensures accurate positioning of components like gears, pulleys, and bearings, reducing misalignment and wear. Combined with a Class 3A thread fit and coarse UNC thread, it offers reliable fastening in high-vibration environments, while the hex drive and knurled head facilitate quick maintenance. This design minimizes downtime and enhances the longevity of mechanical systems, delivering consistent performance in precision engineering projects.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC thread with Class 3A fit for high precision, a shoulder diameter of 3/4" with tolerances from -0.004" to -0.002", and a shoulder length of 1 1/2" with tolerances from -0.005" to 0.005". It complies with ASME B18.3 specifications for dimensional accuracy and performance, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards for environmental safety and restricted substance control.