S-97832A286 1/4"-20 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 and washdown applications.
• Exceptional mechanical strength with a tensile strength of 70,000 psi and shear strength of 35,000 psi for reliable performance under high-stress conditions.
• Precise component alignment enabled by the 1-3/4" shoulder with controlled diameter tolerance, reducing wear and simplifying assembly.
• Secure and repeatable fastening ensured by the Class 3A thread fit on the 1/4"-20 UNC coarse thread, minimizing the risk of loosening.
• Easy installation and removal with a 3/16" hex drive and knurled head for improved grip, even with gloved hands.
• Long-term operational reliability supported by Rockwell B55 hardness, providing excellent durability and resistance to deformation.
• Guaranteed quality and safety through compliance with ASME B18.3, RoHS 3, and REACH standards, ensuring material and performance consistency.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical alignment and pivot point requirements in demanding industrial applications. The unthreaded shoulder acts as a precise datum for locating gears, pulleys, and linkages, preventing misalignment and reducing bearing surface wear. Manufactured from 18-8 Stainless Steel, it offers excellent resistance to rust and corrosion, making it suitable for food processing, packaging machinery, and outdoor equipment. The Class 3A thread fit on the 1/4"-20 UNC coarse thread ensures a tight, secure connection that resists vibration-induced loosening. Combined with a knurled head and hex drive, it provides a fast and reliable fastening solution for maintenance and assembly lines, enhancing overall equipment efficiency and reducing downtime.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with a Class 3A fit for high-precision assembly. The shoulder diameter is 3/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 1-3/4" with a tolerance of -0.005" to 0.005". It is manufactured in compliance with the ASME B18.3 specification and is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant.