S-8077A541 5/8"-11 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 outdoor applications.
• Enhanced durability and wear resistance from the black oxide finish, providing added protection against rust and reducing galling.
• High-strength performance offering 70,000 psi tensile strength and 35,000 psi shear strength for reliable, heavy-duty load-bearing applications.
• Precise alignment and smooth rotation with a 2 1/4" shoulder length and standard shoulder fit, minimizing component wear and ensuring accurate assembly.
• Secure, high-precision threading with Class 3A UNC coarse threads for excellent grip and vibration resistance in demanding conditions.
• Easy installation and removal using the 3/8" hex socket drive and knurled head for improved tool grip and reduced slippage.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety, reliability, and environmental responsibility.

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy industrial equipment. The 316 stainless steel material provides exceptional resistance to corrosion and chemical exposure, making it suitable for marine, chemical processing, and food-grade applications. The black oxide finish not only enhances corrosion protection but also reduces friction during assembly, prolonging the lifespan of mating components. With its Class 3A thread fit and coarse UNC threading, this shoulder bolt ensures secure fastening even under high vibration, preventing loosening in dynamic environments. The 2 1/4" shoulder length offers precise positioning for gears, pulleys, and rotating assemblies, reducing misalignment and wear. Ideal for use in conveyor systems, robotic arms, and precision instruments, this screw delivers reliable performance where accuracy and durability are paramount.

Specification Summary & Compliance

This shoulder screw features precise dimensional tolerances, including a Class 3A thread fit for superior thread engagement and a shoulder diameter tolerance of -0.004" to -0.002". It adheres to ASME B18.3 specifications for consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for hazardous substances. Manufactured from 316 stainless steel with a black oxide finish, it guarantees reliability in demanding industrial applications.