S-97832A307 5/16"-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Exceptional load-bearing capacity from 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable performance in demanding applications.
• Precise component alignment and smooth rotation enabled by the 3" shoulder with controlled diameter and length tolerances.
• Secure, high-precision fastening with Class 3A thread fit and 5/16"-24 UNF fine threads, minimizing the risk of loosening under vibration.
• Easy installation and removal using a standard 3/16" hex key drive and a knurled head for enhanced grip.
• Consistent quality and interchangeability guaranteed by compliance with the ASME B18.3 standard.
• Safe for regulated industries as it is RoHS 3 and REACH compliant, meeting strict environmental and health standards.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical alignment and pivot point requirements in precision assemblies. The 3" shoulder acts as a precise shaft for locating parts like gears, pulleys, and linkages, eliminating the need for additional bushings and reducing assembly complexity. Manufactured from 18-8 Stainless Steel, it provides excellent resistance to rust and corrosion, ensuring long-term reliability in machinery, automotive, and electronic equipment. The Class 3A UNF fine thread offers a tighter fit than standard threads, which is crucial for maintaining clamp load in high-vibration environments. The combination of a socket head with a knurled texture allows for secure tool engagement and manual adjustment, making it a versatile and robust solution for engineers seeking to improve the durability and accuracy of their designs.

Specification Summary & Compliance

This shoulder screw features a 5/16"-24 UNF fine thread with a Class 3A fit for high precision. The shoulder has a diameter of 3/8" (tolerance: -0.004" to -0.002") and a length of 3" (tolerance: -0.005" to 0.005"). It is manufactured to meet ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.