S-97345A245 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 and marine environments
• Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable performance in high-stress applications
• Precise alignment and smooth rotation ensured by the 3/4" shoulder with tight diameter and length tolerances
• Secure, high-torque installation using the 3/16" hex socket drive and knurled head for improved grip
• Consistent, reliable threading with Class 3A fit and 1/4"-20 UNC coarse thread for quick assembly and vibration resistance
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance and environmental safety
• Durable, long-lasting performance backed by Rockwell B79 hardness, reducing wear and maintenance needs

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery, automation systems, and precision equipment. The 3/4" shoulder length provides a stable bearing surface for rotating components like gears, pulleys, and linkages, minimizing misalignment and reducing wear on mating parts. The Class 3A thread fit and coarse UNC threading ensure rapid, secure fastening even in high-vibration environments, while the knurled head and hex socket drive allow for easy installation with standard tools. Its high tensile and shear strength makes it suitable for heavy-duty applications, from conveyor systems to robotic arms, where reliability and corrosion resistance are paramount.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with Class 3A fit, a shoulder diameter of 3/8" (tolerance: -0.004" to -0.002"), and a shoulder length of 3/4" (tolerance: -0.005" to 0.005"). It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring both precision and regulatory adherence for industrial use.