S-91273A116 5-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• High tensile strength of 70,000 psi ensures secure fastening under heavy loads, reducing the risk of failure in demanding applications.
• Precision 1/2" shoulder with tight tolerances provides accurate alignment and spacing for components, minimizing assembly errors.
• Knurled head texture and hex socket drive offer enhanced grip and torque application, preventing slippage during installation.
• Class 2A thread fit and coarse UNC threading allow for easy assembly and disassembly while maintaining strong holding power.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global industry standards for restricted substances.
• Rockwell B55 hardness delivers excellent wear resistance, extending the screw's service life in high-use scenarios.

Professional Applications & Engineering Value

This 5-40 UNC shoulder screw is engineered to address common industrial challenges, such as misalignment and component wear in precision machinery. Made from 18-8 stainless steel, it provides reliable corrosion resistance in moist or chemical-exposed settings, reducing maintenance needs. The 1/2" shoulder length with strict tolerances ensures accurate positioning in assemblies like rotating shafts or bearings, preventing movement and enhancing operational stability. The socket head design with a knurled texture allows for secure tool engagement, speeding up installation in tight spaces while the coarse thread and Class 2A fit facilitate quick adjustments. Ideal for automotive, aerospace, and manufacturing equipment, this screw supports efficient, durable fastening solutions that withstand high stress and environmental factors.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. Manufacturing includes precise shoulder dimensions (e.g., diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005") for reliable performance in industrial applications.