S-8077A562 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and black oxide finish, ideal for harsh industrial environments
• Precise component alignment through 3" shoulder length with tight tolerances for stable machinery assembly
• High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Reliable thread engagement with Class 3A UNC coarse threads ensuring secure fastening in high-vibration settings
• Enhanced grip and tool compatibility through knurled head texture and standard hex socket drive design
• Industry compliance assurance meeting ASME B18.3 specifications and environmental RoHS/REACH standards
• Optimized durability with Rockwell B79 hardness providing excellent wear resistance in continuous operation

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw with black oxide finish addresses critical engineering challenges in industrial machinery and precision equipment. The 3" shoulder length with controlled tolerances provides exact bearing surfaces for rotating components, eliminating misalignment issues in conveyor systems, robotic arms, and manufacturing fixtures. The Class 3A UNC coarse thread configuration ensures rapid assembly while maintaining vibration resistance in high-cycle applications. Combining 70,000 psi tensile strength with superior corrosion resistance, this fastener delivers long-term reliability in chemical processing, marine environments, and food processing equipment where moisture and corrosive agents degrade ordinary fasteners. The knurled head and hex socket drive facilitate secure tool engagement during installation in confined spaces.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit and shoulder diameter tolerance of -0.004" to -0.002" for precision alignment. Thread specification follows 1/2"-13 UNC coarse thread pattern with 7/8" thread length. Compliant with ASME B18.3 dimensional standards and certified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Mechanical properties include Rockwell B79 hardness and minimum 35,000 psi shear strength for reliable performance in industrial applications.