S-8077A596 5/16"-18 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 extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress conditions.
• Precision alignment and smooth rotation ensured by the Class 3A thread fit and a consistent 4 3/4" shoulder length with tight tolerances.
• Enhanced grip and easy assembly provided by the knurled head and standard hex socket drive for secure tool engagement.
• Durable, wear-resistant surface from the black oxide finish, which also reduces light reflection and provides a sleek appearance.
• Broad compatibility and reliability with UNC coarse threads and right-hand threading, meeting ASME B18.3 standards for consistent quality.
• Compliance with global regulations including RoHS 3 and REACH, ensuring safety and environmental responsibility in your applications.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw with a black oxide finish is engineered to address critical challenges in precision machinery, automation systems, and assembly jigs. The Class 3A thread fit and precisely machined shoulder ensure minimal play and accurate component positioning, reducing wear and maintenance downtime. Its high tensile and shear strength makes it suitable for dynamic loads in robotics, conveyor systems, and packaging equipment, where UNC coarse threads facilitate quick assembly and disassembly. The knurled head and hex drive enhance handling in tight spaces, while the corrosion-resistant material and compliant finishes support long-term reliability in demanding industrial environments.

Specification Summary & Compliance

This shoulder screw features a 5/16"-18 UNC thread with Class 3A precision fit, a shoulder diameter of 3/8" (tolerance: -0.004" to -0.002"), and a shoulder length of 4 3/4" (tolerance: -0.005" to 0.005"). Manufactured in accordance with ASME B18.3 specifications, it ensures dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting stringent environmental and safety standards for industrial use.