S-97832A316 1/4"-20 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 and washdown applications.
• Precise component alignment and pivot points ensured by the 2 1/8" shoulder with tight diameter tolerance for reduced assembly play.
li>High-strength performance under load with a tensile strength of 70,000 psi and a minimum shear strength of 35,000 psi for demanding applications.
• Reliable, vibration-resistant fastening provided by the Class 3A thread fit and coarse 1/4"-20 UNC thread for secure connections.
• Easy installation and removal in confined spaces using the standard hex socket drive (5/32") and knurled head for superior grip.
• Long-term durability and material integrity backed by a Rockwell B55 hardness, resisting wear and deformation.
• Guaranteed quality and safety compliance meeting ASME B18.3 specifications and being RoHS 3 and REACH compliant.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to solve critical alignment and pivot challenges in industrial applications. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for machinery, food processing equipment, and outdoor uses. The 2 1/8" shoulder length acts as a precise datum for locating parts like gears, pulleys, and linkages, minimizing misalignment and reducing wear on components. The Class 3A thread fit and coarse UNC threads ensure a secure, vibration-resistant hold, which is vital in dynamic systems. The combination of a hex socket drive and knurled head allows for efficient torque application even in tight spaces, speeding up assembly and maintenance while preventing tool slippage.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with a Class 3A thread fit for high precision. The shoulder diameter is 5/16" with a tolerance of -0.004" to -0.002", and the shoulder length is 2 1/8" with a tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 standards and is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant.