S-91273A926 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 extending service life.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress conditions.
• Precision alignment and smooth rotation enabled by the 1" shoulder with tight diameter and length tolerances, reducing wear on mating parts.
• Secure, high-torque installation facilitated by the 5/16" hex drive and knurled head, preventing tool slippage and ensuring a tight fit.
• Wide compatibility and easy assembly with the standard 5/8"-11 UNC coarse thread and Class 2A fit, suitable for various machinery and equipment.
• Enhanced durability from a Rockwell B55 hardness, providing excellent resistance to deformation and abrasion.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global industrial supply chains.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical challenges in industrial assembly and precision machinery. The 1" shoulder length with minimal tolerances provides a stable bearing surface, preventing misalignment and reducing friction in rotating assemblies like pivots, linkages, and gears. The 5/8"-11 UNC coarse thread and Class 2A fit ensure quick, reliable fastening in high-vibration environments, while the hex drive and knurled head offer superior grip for secure installation without stripping. Made from corrosion-resistant stainless steel, it withstands demanding conditions, making it a durable choice for automotive, aerospace, and manufacturing equipment where strength and long-term reliability are paramount.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent, precise engagement. The shoulder features a diameter of 5/8" with a tolerance of -0.004" to -0.002" and a length of 1" with a tolerance of -0.005" to 0.005", ensuring high dimensional accuracy. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for environmentally regulated applications without hazardous substances.