S-8077A381 10-32 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 reduced maintenance
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength, ensuring reliable load-bearing in demanding applications
• Precise alignment and smooth rotation thanks to the Class 3A thread fit and standard shoulder fit, minimizing vibration and part wear
• Secure, non-slip installation with the knurled socket head and 1/8" hex drive, allowing for firm tool grip and consistent torque application
• Versatile fine-thread design using 10-32 UNF thread, offering excellent holding power and resistance to loosening under dynamic loads
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards, ensuring safety and environmental responsibility

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision assemblies, such as in machinery, automotive, and electronics. The black oxide finish enhances corrosion resistance, reducing failure risks in humid or corrosive settings. Its 10-32 UNF fine thread and Class 3A fit provide tight tolerances, preventing backlash and ensuring stable connections in high-vibration environments. The 1-1/4" shoulder length allows for accurate component spacing and smooth rotational movement, making it ideal for pivots, guides, and bearing supports. By combining high tensile strength with a knurled socket head for secure driving, this fastener minimizes assembly errors and extends equipment lifespan in industrial applications.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, with precise dimensions including a Class 3A thread fit for superior engagement and a shoulder diameter tolerance of -0.004" to -0.002". It is manufactured in the inch system and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.