S-91273A264 5/8"-11 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress conditions
• Precise alignment and smooth rotation ensured by the 4-1/2" shoulder with controlled diameter tolerance for accurate bearing or bushing fit
• Secure and easy installation with a 5/16" hex socket drive and knurled head texture, providing excellent grip and reducing tool slippage
• Consistent thread engagement through Class 2A UNC coarse threads, facilitating quick assembly and reducing cross-threading risks
• Compliance with environmental regulations, being RoHS 3 and REACH compliant, ensuring safety and suitability for global markets
• Durable and wear-resistant with a Rockwell B55 hardness, maintaining integrity through repeated use and mechanical loads

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in precision machinery. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it suitable for applications in automotive, aerospace, and manufacturing equipment where exposure to moisture or chemicals is common. The 4-1/2" shoulder length with tight tolerances ensures accurate positioning of moving parts, such as in pivots, gears, and linkages, reducing wear and minimizing maintenance downtime. The hex socket head with knurled texture allows for high-torque installation in confined spaces, enhancing assembly efficiency. Ideal for heavy-duty shoulder bolts in robotic arms or conveyor systems, it delivers reliable performance under dynamic loads, supported by its high tensile and shear strengths.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent fastening. Key dimensions include a shoulder diameter of 5/8" with a tolerance of -0.004" to -0.002" and a shoulder length of 4-1/2" with a tolerance of -0.005" to 0.005", ensuring precision in assembly. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free from hazardous substances and suitable for industrial use worldwide.