S-97345A248 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh industrial environments and chemical exposure.
• Precise alignment and pivot functionality thanks to the 3/8" shoulder diameter with tight tolerances, ensuring smooth rotational movement.
• High-strength performance delivering 70,000 psi tensile and 35,000 psi shear strength for demanding mechanical applications.
• Reliable thread engagement with Class 3A fit and 1/4"-20 UNC coarse threads, providing secure fastening and vibration resistance.
• Easy installation and removal using a standard 3/16" hex key drive and knurled head for enhanced grip and torque application.
• Long-lasting durability with Rockwell B79 hardness, maintaining structural integrity under repetitive loads and stress.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and rotating assemblies. The 3/8" shoulder diameter with controlled tolerances acts as a reliable bearing surface or pivot point, minimizing wear and maintaining alignment in high-motion components. The 1/4"-20 UNC coarse thread with Class 3A fit ensures rapid assembly and robust clamping force, reducing the risk of loosening in vibrating environments. Its hex socket drive and knurled head facilitate secure tool engagement, speeding up maintenance in confined spaces. Ideal for applications requiring corrosion resistance and consistent performance, this screw supports efficient production and extended equipment life in sectors like manufacturing, robotics, and material handling.

Specification Summary & Compliance

This shoulder screw features precise dimensional control, including a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". Thread specifications adhere to 1/4"-20 UNC coarse threads with Class 3A fit, ensuring high accuracy and interchangeability. Manufactured in compliance with ASME B18.3 standards, it meets rigorous mechanical and dimensional requirements. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for global industrial use.