S-91273A686 5/8"-11 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance and durability with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Enhanced wear resistance and reduced light reflection thanks to the black oxide finish, extending service life.
• High tensile and shear strength (70,000 psi and 35,000 psi respectively) for reliable performance in heavy-duty applications.
• Secure, non-slip fastening enabled by the knurled head and 5/16" hex drive, allowing for high torque application.
• Precise alignment and component location with a consistent 5/8" shoulder diameter and standard shoulder fit.
• Easy assembly and reliable thread engagement with coarse UNC threads and a Class 2A thread fit for consistent performance.
• Compliance with major environmental regulations (RoHS 3 and REACH), ensuring suitability for global supply chains.

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to solve critical alignment and pivoting challenges in demanding assemblies. The 18-8 Stainless Steel material provides excellent resistance to corrosion and oxidation, which is crucial for machinery operating in humid or chemically aggressive environments. The Black Oxide finish further enhances surface durability while minimizing galling. The precision-machined shoulder acts as a built-in spacer or bearing surface, eliminating the need for additional components and reducing assembly time in applications like linkages, gears, and rotating fixtures. The combination of a coarse UNC thread and Class 2A fit ensures rapid installation and a secure hold, making it a reliable choice for high-vibration industrial equipment, automotive jigs, and heavy machinery where shear strength and positional accuracy are paramount.

Specification Summary & Compliance

This shoulder screw features a 5/8"-11 UNC thread with a Class 2A thread fit for standard clearance and reliable engagement. The shoulder is manufactured to precise dimensions with a diameter tolerance of -0.004" to -0.002" and a length tolerance of -0.005" to 0.005". The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to strict environmental and safety standards for industrial use.