S-91273A248 5/8"-11 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments.
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, providing dependable performance under heavy loads.
• Secure, non-slip installation thanks to the knurled hex socket head and 5/16" drive, allowing for precise torque application.
• Accurate alignment and pivot function from the precision-ground 5/8" diameter shoulder with controlled tolerances.
• Easy assembly and disassembly with coarse UNC threads and Class 2A fit, ensuring smooth engagement and interchangeability.
• Durable surface hardness rated Rockwell B55, resisting wear and deformation during repeated use.
• Global compliance assurance meeting RoHS 3 and REACH standards for safe, environmentally responsible manufacturing.

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to address critical alignment and rotational motion challenges in industrial machinery. The 18-8 stainless steel material offers excellent resistance to rust and chemical exposure, making it ideal for food processing, marine, and outdoor equipment. The knurled hex socket head prevents tool slippage during high-torque installation, reducing assembly errors and maintenance downtime. With a precision shoulder diameter of 5/8" and a coarse thread, it ensures secure positioning of moving parts like gears, linkages, and bearings, while the Class 2A thread fit guarantees consistent performance in automated production lines. Its robust tensile and shear strength supports heavy-duty applications, from conveyor systems to robotic arms, enhancing operational safety and longevity.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder diameter is manufactured to a tolerance of -0.004" to -0.002", and the shoulder length to -0.005" to 0.005", ensuring precise component alignment. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting sustainable industrial practices.