S-8077A283 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life
• Enhanced durability and wear resistance from the black oxide finish, which also provides a sleek, non-reflective appearance
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for reliable load-bearing in demanding applications
• Precise alignment and smooth rotation ensured by the 2" shoulder length with tight diameter and length tolerances
• Secure, high-precision threading with Class 3A fit and coarse UNC thread for robust fastening and vibration resistance
• Easy installation and removal using a standard 1/4" hex key drive and knurled head for improved grip
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance and environmental safety

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial fastening and precision assembly. The combination of a 2" shoulder length with minimal tolerances provides a stable bearing surface, reducing wear on mating parts and ensuring accurate alignment in machinery, pivots, and linkages. The black oxide finish on the 316 stainless steel enhances corrosion resistance, making it suitable for applications in chemical processing, marine environments, and outdoor equipment. The 3/8"-16 UNC thread with Class 3A fit offers superior thread engagement, minimizing the risk of loosening under vibration and dynamic loads. This shoulder screw delivers reliable performance in high-stress scenarios, from automotive assemblies to heavy-duty industrial machinery, by providing a robust, long-lasting fastener solution that meets rigorous engineering demands.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with Class 3A thread fit for high precision. The shoulder diameter is 1/2" with a tolerance of -0.004" to -0.002", and the shoulder length is 2" with a tolerance of -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 safety and regulatory adherence for industrial use.