S-8077A593 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 in high-stress applications.
• Precision alignment and reduced wear ensured by the Class 3A thread fit and standard shoulder fit for smooth assembly and long-term durability.
• Enhanced grip and handling provided by the knurled head texture, facilitating easier installation and removal in tight spaces.
• Optimized for high-torque applications with a 3/16" hex drive socket head, allowing for secure fastening and reduced risk of stripping.
• Durable surface protection from the Black Oxide finish, which adds an extra layer of resistance against wear and oxidation.
• Guaranteed compliance and reliability meeting ASME B18.3 standards, RoHS 3, and REACH regulations for safe and consistent quality.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The 316 Stainless Steel material provides excellent resistance to corrosion and chemicals, making it suitable for applications in marine, chemical processing, and food industries. The UNC coarse thread and Class 3A fit ensure secure, vibration-resistant connections, while the 3 1/4" shoulder length offers stable support for rotating parts like bearings and pulleys, reducing misalignment and wear. The Black Oxide finish enhances durability and minimizes galling, and the socket head with hex drive allows for efficient installation in confined spaces. Ideal for use in assembly jigs, conveyor systems, and robotic arms, this screw delivers consistent performance where precision and strength are paramount.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, with precise dimensional tolerances including a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". The thread fit conforms to Class 3A for high precision, and the product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.