S-97832A306 5/16"-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Durability: Crafted from 18-8 Stainless Steel with a Rockwell B55 hardness, offering superior corrosion resistance and long-term reliability in harsh environments.
• High Tensile & Shear Strength: Withstands demanding loads with a 70,000 psi tensile strength and 35,000 psi minimum shear strength, ensuring component integrity under stress.
• Precision Thread Fit: Features a Class 3A thread fit for tighter tolerances, reducing backlash and providing secure, vibration-resistant fastening in precision assemblies.
• Secure & Easy Installation: The hex socket drive and knurled head allow for high-torque application and improved grip, facilitating quick and reliable installation.
• Accurate Shoulder Positioning: The 3/8" shoulder diameter with tight tolerances ensures precise alignment and acts as a pivot or bearing surface, minimizing part wear.
• Industry Standard Compliance: Manufactured to meet ASME B18.3 specifications, guaranteeing interchangeability and reliability in professional applications.
• Environmental & Safety Assurance: Compliant with RoHS 3 and REACH regulations, making it safe for use in various industries without hazardous substances.

Professional Applications & Engineering Value

This socket head shoulder screw is engineered to address critical challenges in mechanical and industrial assemblies where precision alignment and high strength are paramount. The 18-8 stainless steel construction provides excellent resistance to corrosion and oxidation, making it ideal for use in environments exposed to moisture or chemicals. The fine UNF thread (5/16"-24) and Class 3A fit ensure a secure, tight connection that resists loosening under vibration, common in machinery, automotive, and aerospace applications. The 3/8" shoulder length serves as a precise datum for rotating components like gears and pulleys, reducing wear and maintaining alignment. With a knurled head for enhanced grip and a hex drive for easy installation, this screw streamlines assembly processes while delivering reliable performance in high-stress scenarios.

Specification Summary & Compliance

This shoulder screw adheres to strict dimensional standards, including a Class 3A thread fit for high precision and a shoulder diameter tolerance of -0.004" to -0.002". It conforms to ASME B18.3 manufacturing specifications, ensuring consistent quality and performance. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for global industrial use.