S-8077A267 1 1/8"-7 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 extended service life
• Enhanced durability and wear resistance from the black oxide finish, providing reliable performance under heavy loads
• Precise thread engagement and vibration resistance with Class 3A thread fit, ensuring secure fastening in critical assemblies
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) for demanding applications requiring robust mechanical integrity
• Easy installation and removal with the knurled socket head and 7/8" hex drive, offering superior grip and torque application
• Accurate shoulder positioning with tight diameter and length tolerances, enabling precise component alignment in machinery
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence

Professional Applications & Engineering Value

This 1 1/8"-7 UNC shoulder screw is engineered to address common industrial challenges such as misalignment, component wear, and fastener failure in high-stress environments. The 316 stainless steel material provides exceptional resistance to corrosion and chemical exposure, making it suitable for marine, chemical processing, and outdoor equipment. The black oxide finish enhances surface hardness and reduces galling, while the Class 3A thread fit and precise shoulder dimensions ensure stable alignment in assemblies like rotating shafts, pulleys, and precision instruments. With its knurled socket head and coarse thread spacing, it allows for quick, secure installation in automated or manual setups, reducing downtime and maintenance costs in manufacturing and heavy machinery applications.

Specification Summary & Compliance

This shoulder screw features a 1 1/8"-7 UNC coarse thread with Class 3A fit for high-precision engagement, and shoulder dimensions including a diameter of 1 1/2" (tolerance: -0.004" to -0.002") and length of 1 1/4" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability in industrial use.