S-8077A576 5/16"-18 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel and Black Oxide finish, ideal for harsh industrial environments.
• High tensile strength of 70,000 psi ensures reliable performance in demanding, high-stress applications.
• Precise Class 3A thread fit guarantees secure fastening and reduced risk of loosening under vibration.
• Long 8" shoulder length provides stable alignment and support for rotating parts like gears and pulleys.
• Knurled head texture offers enhanced grip for easier manual adjustments during assembly.
• Hex socket drive design allows for high-torque installation with standard tools, minimizing slip.
• Compliance with ASME B18.3, RoHS, and REACH ensures quality, safety, and environmental standards are met.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw is engineered to address common industrial challenges, such as misalignment and corrosion in machinery. The 8" shoulder length acts as a precise pivot or spacer, maintaining component alignment in assemblies like conveyor systems or robotic arms. With a Class 3A thread fit and coarse UNC thread, it resists vibration-induced loosening, while the Black Oxide finish enhances durability in moist or chemical-exposed settings. Ideal for high-stress applications including automotive and aerospace, it combines 70,000 psi tensile strength with easy installation via a hex drive, reducing downtime and ensuring long-term reliability.

Specification Summary & Compliance

This shoulder screw features a 5/16"-18 UNC thread with Class 3A fit for tight tolerances, and an 8" shoulder with precise diameter and length tolerances. It meets ASME B18.3 specifications for dimensional accuracy, and is compliant with RoHS 3 and REACH regulations, ensuring it is free from hazardous substances and suitable for global industrial use.