S-8077A135 3/4"-10 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel and black oxide finish, ideal for harsh industrial environments.
• Precise alignment and smooth rotation ensured by the 1" shoulder diameter with tight tolerance fit.
• High tensile strength (70,000 psi) and Rockwell B79 hardness for reliable, long-lasting performance under heavy loads.
• Class 3A thread accuracy provides secure, vibration-resistant fastening with 3/4"-10 UNC coarse threads.
• Easy installation and removal with a 1/2" hex drive and knurled head for enhanced grip.
• Compliance with ASME B18.3 and environmental standards (RoHS 3, REACH) ensures quality and regulatory safety.
• Durable shoulder length (4 3/4") supports consistent spacing and bearing functions in assemblies.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation, and heavy-duty equipment. The black oxide finish enhances corrosion resistance, reducing maintenance in humid or chemically exposed settings. With a Class 3A thread fit and coarse 3/4"-10 UNC thread, it delivers secure fastening that resists loosening under vibration, while the 1" shoulder diameter provides exact alignment for rotating components like gears and pulleys. Ideal for applications requiring high tensile strength and reliable shoulder support, such as conveyor systems or robotic arms, it minimizes wear and extends service life in demanding industrial environments.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, with precise dimensions including a Class 3A thread fit, shoulder diameter tolerance of -0.004" to -0.002", and shoulder length tolerance of -0.005" to 0.005". It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for global industrial use.