S-8077A787 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 Stainless Steel construction and Black Oxide finish, ideal for harsh environments and extended service life.
• Superior load-bearing capacity with a high tensile strength of 70,000 psi and minimum shear strength of 35,000 psi for demanding applications.
• Precision alignment and reduced wear thanks to the precisely machined shoulder with a diameter of 5/8" and length of 3/4", providing a stable bearing surface.
• Reliable, vibration-resistant fastening ensured by the Class 3A thread fit and coarse UNC thread, which offers excellent grip and durability.
• Easy installation and removal with a hex socket drive (5/16") and knurled head, allowing for secure tool engagement and manual handling.
• Guaranteed quality and safety compliance by meeting ASME B18.3 specifications and being RoHS 3 & REACH compliant for global industrial use.
• Optimized for high-stress assemblies with a Rockwell B79 hardness, providing a robust solution for mechanical linkages and rotating parts.

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 enhances corrosion resistance, making it suitable for environments exposed to moisture, chemicals, or outdoor conditions. The 3/8"-16 UNC coarse thread and Class 3A thread fit ensure secure, vibration-resistant connections, reducing the risk of loosening under dynamic loads. The knurled head and hex socket drive facilitate quick assembly and disassembly, saving time in maintenance and production. With a shoulder diameter of 5/8" and length of 3/4", it provides exact positioning for bearings, pulleys, or linkages, minimizing misalignment and wear. This screw delivers long-term reliability and performance in applications such as conveyor systems, robotic arms, and automotive assemblies, where high tensile strength and dimensional accuracy are paramount.

Specification Summary & Compliance

This shoulder screw adheres to strict dimensional tolerances, including a Class 3A thread fit for superior engagement and a shoulder diameter tolerance of -0.004" to -0.002" with a shoulder length tolerance of -0.005" to 0.005". It conforms to ASME B18.3 manufacturing standards, ensuring consistency and reliability. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for use in various industrial sectors.