S-8077A262 1 1/8"-7 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for long-lasting performance in harsh environments
• Enhanced durability and wear resistance from black oxide finish that reduces galling and extends service life
• Exceptional load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for heavy-duty applications
• Precise alignment and smooth rotation thanks to Class 3A thread fit and standardized shoulder diameter tolerances
• Secure installation and removal with knurled hex socket head design providing superior grip and torque transmission
• Reliable industrial compliance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH
• Optimized for coarse threading applications with UNC thread pattern ensuring quick assembly and reduced cross-threading risk

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 significantly enhances surface durability while reducing friction during assembly operations. With its 1½" shoulder length maintaining precise component spacing and the Class 3A thread fit ensuring secure fastening, this fastener addresses common industrial challenges including misalignment, vibration loosening, and environmental degradation. The knurled hex socket head provides exceptional torque transmission for installations in confined spaces, making it ideal for machinery, automotive, and marine applications where reliability under stress is non-negotiable. These shoulder screws maintain dimensional stability across temperature variations, offering consistent performance in demanding operational environments.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and UNC 1⅛"-7 coarse threading. Shoulder diameter tolerance maintained at -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005" for consistent performance. Full compliance with ASME B18.3 specifications, RoHS 3 (2015/863/EU) environmental directives, and REACH (EC 1907/2006) regulations ensures adherence to industry quality and safety standards. Material hardness certified at Rockwell B79 with verified mechanical properties including 70,000 psi tensile strength and 35,000 psi minimum shear strength.