S-8077A582 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 chemical exposure.
• Enhanced durability and wear resistance from the black oxide finish, providing long-lasting performance and a sleek appearance.
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable load-bearing in demanding applications.
• Precise alignment and smooth rotation thanks to the knurled head and standard shoulder fit, reducing assembly time and improving operational efficiency.
• Secure and easy installation with a hex socket drive and coarse UNC threading, allowing for quick fastening with standard tools.
• Consistent thread quality through Class 3A fit, minimizing the risk of cross-threading and ensuring tight, reliable connections.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence for global use.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The black oxide finish not only enhances corrosion resistance but also reduces friction, extending service life in high-wear scenarios like pivots, guides, and rotating assemblies. Its coarse UNC threading and Class 3A thread fit ensure rapid, secure installation, minimizing downtime in production lines. The knurled head provides superior grip for manual adjustments, while the robust 70,000 psi tensile strength supports high-stress applications without failure. Ideal for use in manufacturing, automotive, and marine industries, this screw delivers reliable performance where alignment accuracy and environmental durability are paramount.

Specification Summary & Compliance

This shoulder screw features precise dimensions including a 5/16"-18 UNC thread with Class 3A fit for tight tolerances, a shoulder diameter of 3/8" with tolerance of -0.004" to -0.002", and a shoulder length of 2 1/2" with tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free of hazardous substances and suitable for international industrial applications.