S-91054A340 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance and durability thanks to 18-8 stainless steel construction and TiCN coating, ideal for harsh industrial environments.
• Exceptional tensile strength of 70,000 psi ensures reliable performance under high-stress applications, reducing the risk of fastener failure.
• Precise shoulder fit with tight tolerances (-0.002" to 0" diameter, 0" to 0.003" length) enables accurate alignment and smooth rotation in assemblies.
• Class 2A thread fit with UNC coarse threading provides easy assembly and disassembly while maintaining secure fastening in various materials.
• Hex socket drive design allows for high-torque installation with standard tools, minimizing slippage and damage during use.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and suitability for global industrial markets.
• Rockwell B55 hardness offers excellent wear resistance, extending the screw's service life in demanding applications.

Professional Applications & Engineering Value

This 5/16"-18 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision machinery, such as in robotics, automotive assemblies, and conveyor systems. The 18-8 stainless steel material combined with a TiCN coating provides outstanding resistance to corrosion and wear, reducing maintenance needs in moist or abrasive conditions. The precisely machined shoulder with tight tolerances ensures minimal play, facilitating smooth pivoting and rotational movement in linkages and bearings. With a coarse UNC thread and Class 2A fit, it offers quick installation and reliable holding power, making it a top choice for industrial applications requiring repeatable accuracy and long-term performance.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. Key specifications include a shoulder diameter tolerance of -0.002" to 0" and shoulder length tolerance of 0" to 0.003", ensuring precise assembly. The product is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting safe and sustainable industrial use.