S-8077A554 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 chemical exposure
• Enhanced durability and wear resistance from the black oxide finish, providing long-lasting performance and reduced maintenance
• Precise alignment and smooth rotation enabled by the 3/4" shoulder diameter with tight tolerances, minimizing component wear
• High-strength fastening with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable performance under heavy loads
• Secure, slip-resistant installation using the knurled socket head and 3/8" hex drive, allowing for high torque application
• Quick assembly and disassembly with 5/8"-11 UNC coarse threads and Class 3A fit, reducing installation time in production lines
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards, ensuring safety and environmental responsibility

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery and heavy-duty industrial equipment. The black oxide finish not only enhances corrosion resistance but also reduces galling in high-friction applications, extending service life in automotive, aerospace, and manufacturing assemblies. The 5/8"-11 UNC coarse thread with Class 3A fit ensures rapid, secure fastening while the precisely machined shoulder diameter provides accurate pivot points and bearing surfaces, eliminating misalignment in rotating components. Its high tensile and shear strength makes it ideal for securing gears, pulleys, and linkages where vibration resistance and load capacity are paramount, reducing downtime and maintenance costs.

Specification Summary & Compliance

This shoulder screw features a 5/8"-11 UNC coarse thread with Class 3A thread fit for precision engagement, a shoulder diameter of 3/4" with tolerance of -0.004" to -0.002", and shoulder length of 3/4" with tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications, it ensures dimensional consistency and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industrial applications.