S-8077A389 10-32 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, providing added protection against abrasion.
• Precise alignment and secure fit thanks to the Class 3A thread fit and standard shoulder, minimizing play in assemblies.
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength, suitable for heavy-duty applications.
• Easy installation and removal using the hex socket drive and knurled head, offering superior grip and torque application.
• Reliable fine threading with 10-32 UNF threads, ensuring tight, vibration-resistant connections in precision equipment.
• Compliance with industry standards including ASME B18.3, RoHS, and REACH, guaranteeing quality and environmental safety.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial settings, such as misalignment and component wear. The black oxide finish enhances corrosion resistance, making it suitable for applications in marine, chemical processing, and outdoor machinery where moisture and chemicals are prevalent. The 10-32 UNF fine thread and Class 3A fit provide exceptional precision, reducing the risk of loosening under vibration in automation systems, robotics, and precision instruments. Its knurled head and hex drive facilitate quick assembly and disassembly, improving maintenance efficiency. By combining high tensile and shear strength with reliable standards compliance, this screw ensures long-term performance in demanding shoulder screw applications, from pivots to spacers, without compromising on safety or durability.

Specification Summary & Compliance

This shoulder screw adheres to tight dimensional tolerances, including a Class 3A thread fit for superior accuracy and a shoulder diameter tolerance of -0.004" to -0.002". It conforms to ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it meets rigorous industry and environmental standards for safe use in global markets.