S-8077A112 3/4"-10 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh or chemical environments.
• Enhanced durability and wear resistance from the black oxide finish, which also reduces light reflection.
• Superior tensile and shear strength (70,000 psi tensile, 35,000 psi min shear) for high-stress, heavy-duty applications.
• Precise alignment and pivot functions enabled by the accurate 1" diameter shoulder with tight tolerance control.
• Secure, high-torque installation facilitated by the 1/2" hex socket drive, preventing cam-out and tool slippage.
• Reliable coarse UNC thread (Class 3A fit) ensures easy assembly and robust fastening in demanding conditions.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety.

Professional Applications & Engineering Value

This 3/4"-10 UNC shoulder screw is engineered to solve critical alignment and load-bearing challenges in industrial assemblies. The 316 stainless steel material provides outstanding resistance to corrosion and oxidation, making it suitable for marine, chemical processing, and food-grade equipment. The 1" shoulder diameter with controlled tolerances acts as a precise locating dowel or pivot point, preventing component misalignment and reducing wear in machinery, conveyor systems, and precision instruments. The black oxide finish not only adds a layer of protection but also minimizes galling during installation. Combined with its 70,000 psi tensile strength and coarse UNC thread, this fastener delivers reliable performance in high-vibration environments, ensuring long-term operational integrity and reducing maintenance frequency.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit for high precision, with a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for industrial use.