S-97832A131 3/8"-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• Superior load-bearing capacity with a high 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications.
• Precise and secure assembly ensured by the Class 3A thread fit and fine UNF thread, minimizing the risk of loosening under vibration.
• Enhanced grip and tool engagement from the knurled head texture and standard hex socket drive, allowing for reliable installation and removal.
• Accurate component alignment and spacing provided by the precision-machined shoulder with controlled diameter and length tolerances.
• Broad industry compatibility by conforming to ASME B18.3 specifications, ensuring reliable performance in standardized equipment.
• Safe for regulated industries with full compliance to RoHS 3 and REACH environmental standards.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical challenges in precision assembly and motion control systems. The 3/4" shoulder length acts as a precise pivot, axle, or spacer, eliminating the need for additional components and reducing assembly complexity in machinery, automotive, and aerospace applications. The Class 3A thread fit and fine UNF thread provide a tight, secure fastening that is highly resistant to vibrational loosening, a common failure point in dynamic systems. Manufactured from 18-8 Stainless Steel, it offers excellent resistance to corrosion and oxidation, ensuring long-term reliability and reducing maintenance costs. The knurled socket head provides a non-slip surface for superior grip during installation, even in greasy or high-torque scenarios, making it an indispensable component for high-performance engineering assemblies.

Specification Summary & Compliance

This shoulder screw features a 3/8"-24 UNF thread with a Class 3A fit for high precision. The shoulder diameter is 1/2" with a tolerance of -0.004" to -0.002", and the shoulder length is 3/4" with a tolerance of -0.005" to 0.005". It is manufactured in compliance with the ASME B18.3 standard and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.