S-8077A259 1 1/8"-7 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
• Exceptional load-bearing capacity with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
• Precise component alignment ensured by Class 3A thread fit and standard shoulder fit for reduced assembly errors
• Enhanced grip and torque application with knurled head texture and 7/8" hex drive for secure fastening operations
• Reliable coarse thread engagement with 1 1/8"-7 UNC threads providing quick assembly in high-vibration settings
• Industry-standard compliance meeting ASME B18.3 specifications for consistent quality and interchangeability
• Environmental regulation adherence with RoHS 3 and REACH compliance for global manufacturing applications

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw delivers critical engineering solutions where precision alignment and corrosion resistance are paramount. The black oxide finish enhances surface durability while providing additional corrosion protection in demanding environments like chemical processing, marine applications, and food machinery. With its 1 1/8"-7 UNC coarse threads and Class 3A thread fit, this shoulder bolt ensures rapid assembly and maintains secure fastening even under high vibration conditions. The combination of 70,000 psi tensile strength and precisely machined shoulder diameter provides reliable pivot points and bearing surfaces in mechanical assemblies, reducing wear and extending equipment service life. The knurled head texture and 7/8" hex drive facilitate positive tool engagement during installation, particularly valuable in confined spaces or when wearing protective gloves.

Specification Summary & Compliance

This shoulder screw maintains precision dimensions including 1 1/2" shoulder diameter with tolerance of -0.004" to -0.002" and 3" shoulder length with tolerance of -0.005" to 0.005". Thread specifications feature 1 1/8"-7 UNC coarse threads with Class 3A thread fit for superior engagement. The component meets ASME B18.3 manufacturing standards and demonstrates Rockwell B79 hardness for consistent performance. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, ensuring environmental responsibility in industrial applications.