S-8077A115 3/4"-10 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 stainless steel and black oxide finish, ideal for harsh industrial environments and extended service life.
• Superior load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength, ensuring reliable performance under high stress.
• Precision alignment and smooth rotation provided by the 1" diameter shoulder with tight tolerances, reducing wear on mating components.
• Secure and efficient installation using the 1/2" hex drive and knurled head, preventing tool slippage and enabling high torque application.
• Reliable thread engagement with Class 3A UNC coarse threads, offering excellent vibration resistance and faster assembly.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety for global supply chains.
• Versatile 5" shoulder length for spacing components accurately in machinery, pivots, and linkages.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial machinery, such as misalignment, corrosion, and mechanical failure. The black oxide finish enhances corrosion resistance, making it suitable for damp or chemically aggressive settings. The 1" shoulder diameter with precise tolerances ensures accurate alignment of bearings, gears, and linkages, minimizing friction and wear. With a 3/4"-10 UNC Class 3A thread and coarse spacing, it provides robust fastening in high-vibration applications like automotive assemblies and heavy equipment. The 70,000 psi tensile strength and hex drive design support demanding operations, from conveyor systems to precision instruments, ensuring long-term reliability and reduced maintenance.

Specification Summary & Compliance

This shoulder screw features a 3/4"-10 UNC Class 3A thread with coarse spacing and right-hand direction, ensuring high precision and strength. Dimensions include a 1" shoulder diameter (tolerance: -0.004" to -0.002") and 5" shoulder length (tolerance: -0.005" to 0.005"), manufactured to ASME B18.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity.