S-8077A131 3/4"-10 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 chemical exposure.
• Enhanced durability and wear resistance from the black oxide finish, which also provides a sleek, non-reflective surface.
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for reliable load-bearing in demanding applications.
• Precise alignment and smooth rotation ensured by the 1" shoulder diameter with tight tolerances and a standard shoulder fit.
• Secure and easy installation with a knurled socket head and 1/2" hex drive, offering excellent grip and torque transmission.
• Accurate and reliable threading featuring a 3/4"-10 UNC coarse thread with Class 3A fit for superior engagement and vibration resistance.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical stress. The black oxide finish not only enhances corrosion resistance but also reduces galling, making it suitable for assembly lines and machinery subjected to frequent adjustments. Its 1" shoulder diameter and 2 3/4" shoulder length provide a precise pivot point or spacer in applications like robotics, conveyor systems, and precision instruments, ensuring smooth rotational movement and reducing wear on mating parts. The coarse UNC thread and Class 3A fit offer quick assembly and high vibration resistance, critical in automotive and aerospace sectors where reliability is paramount. By combining robust materials with exacting tolerances, this fastener minimizes downtime and maintenance costs in industrial applications.

Specification Summary & Compliance

This shoulder screw adheres to tight dimensional tolerances, including a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005", ensuring precision in assembly. The thread specifications feature a 3/4"-10 UNC coarse thread with a Class 3A fit for high accuracy and strength. It meets ASME B18.3 standards for consistency and reliability, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industries without hazardous substances.