S-91259A316 7/8"-9 ASME B18.3 Shoulder Screws
Shoulder Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 140,000 psi tensile strength and 84,000 psi shear strength for reliable performance in high-stress applications
- Superior corrosion resistance thanks to the black oxide finish, extending service life in demanding industrial environments
- Precise thread engagement with Class 3A fit and UNC coarse thread design ensuring secure fastening and vibration resistance
- Enhanced grip and torque application through the knurled socket head and 5/8" hex drive, preventing tool slippage during installation
- Accurate component alignment provided by the precisely toleranced shoulder (diameter tolerance: -0.004" to -0.002") for stable assembly operations
- Consistent mechanical properties with Rockwell C32 hardness, maintaining dimensional stability under heavy loads
- Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations (RoHS 3, REACH) for global industrial use
Professional Applications & Engineering Value
This alloy steel shoulder screw delivers critical engineering solutions for industrial machinery, automation systems, and precision equipment. The 7/8"-9 UNC coarse thread with Class 3A fit provides superior vibration resistance in dynamic applications, while the black oxide finish protects against corrosion in harsh operating conditions. The precisely machined shoulder ensures accurate component alignment in rotating assemblies and bearing applications, eliminating misalignment issues. With 140,000 psi tensile strength and 84,000 psi shear strength, this socket head shoulder screw maintains structural integrity in high-load scenarios, making it ideal for construction equipment, automotive jigs, and industrial robotics where reliability is paramount.
Specification Summary & Compliance
This shoulder screw maintains Class 3A thread fit with UNC coarse thread profile (7/8"-9) and features precise shoulder diameter tolerance (-0.004" to -0.002") and shoulder length tolerance (-0.005" to 0.005"). Manufactured to ASME B18.3 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications requiring certified components.
