S-8077A211 5-40 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh or chemical-exposed environments.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under heavy loads.
• Precise Class 3A thread fit ensures tight, secure fastening with minimal play in high-vibration applications.
• Enhanced grip and tool engagement from the knurled head and 3/32" hex drive, preventing slippage during installation.
• Durable black oxide finish provides added corrosion protection and a reduced-glare, professional appearance.
• Coarse UNC threads enable quicker assembly and are less prone to clogging in dirty or debris-filled conditions.
• Compliance with RoHS 3 and REACH ensures environmental safety and unrestricted use in regulated industries.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical alignment and pivot point requirements in demanding industrial applications. The black oxide finish enhances its resistance to oxidation and wear, making it suitable for machinery, automotive assemblies, and precision instruments where exposure to moisture or chemicals is a concern. The knurled socket head and hex drive design provide superior torque transmission, reducing the risk of stripping and ensuring consistent clamping force. With its UNC coarse thread and Class 3A fit, it offers reliable engagement in components subject to dynamic stresses, minimizing loosening and maintaining structural integrity in high-vibration environments like robotics, conveyor systems, and fixture manufacturing.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for precision tolerance. Key dimensional attributes include a shoulder diameter tolerance of -0.004" to -0.002" and a shoulder length tolerance of -0.005" to 0.005". The screw is manufactured from 316 stainless steel with a black oxide finish and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for global industrial use.