S-8077A372 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 chemical exposure.
• Enhanced durability and wear resistance from the black oxide finish, which also provides a sleek, non-reflective appearance.
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable performance under heavy loads.
• Precise alignment and smooth rotation thanks to the 2" shoulder with standard fit, minimizing component wear.
• Secure, high-precision threading with a Class 3A fit 10-32 UNF fine thread for excellent vibration resistance and holding power.
• Easy installation and removal using a standard 1/8" hex drive and knurled socket head for improved grip.
• Compliance with major industrial standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision assembly and motion control systems. The black oxide finish not only enhances corrosion resistance but also reduces galling in high-friction applications. Its 10-32 UNF fine thread with Class 3A fit provides superior clamping force and vibration resistance, essential for machinery, automotive, and aerospace components. The precisely machined 2" shoulder acts as a pivot or spacer, ensuring accurate alignment in rotating assemblies like bearings, linkages, and gears. Made from high-hardness Rockwell B79 material, it withstands repetitive stress, making it a reliable industrial fastener for demanding environments where failure is not an option.

Specification Summary & Compliance

This shoulder screw features a 10-32 UNF fine thread with Class 3A precision tolerance for tight, secure fits. The shoulder diameter is 1/4" with a tolerance of -0.004" to -0.002", and the shoulder length is 2" with a tolerance of -0.005" to 0.005", ensuring consistent performance. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, guaranteeing safety and regulatory adherence for global industrial use.