S-8077A394 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 extended service life.
• Exceptional mechanical strength offering a high 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance under heavy loads.
• Precise and secure fit ensured by the Class 3A thread fit and fine 10-32 UNF threads, minimizing the risk of loosening in critical assemblies.
• Enhanced durability and wear resistance from the black oxide finish, which also provides a sleek, non-reflective appearance.
• Easy and secure installation with the hex socket drive and knurled head, allowing for high torque application and improved grip.
• Accurate alignment and spacing facilitated by the precision-machined shoulder with tight diameter and length tolerances.
• Global compliance and reliability meeting ASME B18.3 specifications and being RoHS 3 & REACH compliant for use in regulated markets.

Professional Applications & Engineering Value

This 316 Stainless Steel Shoulder Screw is engineered to address common challenges in precision assembly and motion control systems. The black oxide finish on the stainless steel substrate significantly enhances corrosion resistance, making it suitable for demanding environments like chemical processing, marine applications, and outdoor machinery. The 10-32 UNF fine thread and Class 3A fit provide a tight, vibration-resistant connection, crucial for maintaining alignment in rotating assemblies, pivoting joints, and guide mechanisms. The precisely machined shoulder acts as a reliable bearing surface or pivot point, reducing wear on connected components and simplifying assembly. Its high tensile strength and Rockwell B79 hardness ensure it can withstand significant operational stresses, offering long-term reliability in industrial automation, aerospace, and precision equipment where failure is not an option.

Specification Summary & Compliance

This shoulder screw features a 10-32 UNF thread with a Class 3A fit for high precision. The shoulder diameter is 1/4" with a tolerance of -0.004" to -0.002", and the shoulder length is 3/4" with a tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant.