S-91273A262 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 reducing maintenance costs.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance in heavy-duty applications and prevents mechanical failure.
• Precision shoulder with tight tolerances (±0.005" on length) guarantees accurate alignment and smooth rotation for components like gears and pulleys.
• Easy installation and removal with a 5/16" hex socket drive and knurled head, providing a secure grip and reducing assembly time.
• Durable Class 2A UNC coarse threads offer excellent engagement and resistance to vibration loosening in demanding machinery.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global industry standards for responsible manufacturing.
• Consistent hardness (Rockwell B55) maintains dimensional stability and wear resistance over extended operational cycles.

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. The 3 1/2" shoulder length with minimal tolerance variations provides a stable bearing surface, essential for applications like rotating shafts, linkages, and cam followers where exact positioning is paramount. Manufactured from 18-8 Stainless Steel, it delivers excellent corrosion resistance, reducing downtime in moist or chemically aggressive environments. The coarse thread design and Class 2A fit ensure quick assembly and reliable fastening under vibration, while the socket head with hex drive allows for compact installation in confined spaces. Ideal for industrial machinery, automotive systems, and conveyor equipment, this shoulder screw enhances operational reliability and extends service life by minimizing misalignment and wear.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent engagement. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring high precision. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free of hazardous substances and suitable for global industrial use.