S-8077A415 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 added protection against rust and galling
• Precise alignment and reduced vibration thanks to the knurled head and Class 3A thread fit, ensuring secure fastening in high-precision assemblies
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, suitable for heavy-duty machinery and structural applications
• Consistent performance and reliability backed by Rockwell B79 hardness and fine 10-32 UNF threads for smooth engagement and load distribution
• Broad compliance and safety meeting ASME B18.3, RoHS 3, and REACH standards, ensuring quality and environmental responsibility
• Easy installation and maintenance with a standard hex socket drive, enabling quick assembly and disassembly in confined spaces

Professional Applications & Engineering Value

This 10-32 UNF thread shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and industrial equipment. The 316 stainless steel material offers exceptional resistance to corrosion and high temperatures, making it ideal for applications in marine, chemical processing, and food-grade environments. The black oxide finish not only enhances aesthetics but also reduces friction and prevents seizing, extending the screw's service life. With a Class 3A thread fit and fine thread spacing, it ensures tight tolerances and minimal backlash, crucial for maintaining alignment in rotating assemblies, pivots, and bearing supports. The knurled head provides improved grip during manual adjustments, while the shoulder diameter and length tolerances guarantee consistent positioning, reducing wear and downtime in high-cycle operations.

Specification Summary & Compliance

This shoulder screw features a 10-32 UNF fine thread with Class 3A fit for precise engagement, and dimensional accuracy per ASME B18.3 specifications. Critical tolerances include shoulder diameter (-0.004" to -0.002") and shoulder length (-0.005" to 0.005"), ensuring reliable performance in demanding applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable manufacturing practices.