S-94731A790 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• High tensile strength of 70,000 PSI ensures reliable performance under heavy loads and stress.
• Precise Class 2A thread fit guarantees smooth assembly and secure fastening with minimal play.
• Durable Rockwell B55 hardness provides excellent wear resistance and long service life.
• Generous 2 1/8" shoulder length offers stable support for rotating components like gears and pulleys.
• External hex drive design allows for easy installation and removal with standard tools.
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory adherence.

Professional Applications & Engineering Value

This 1/4-20 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial machinery. The 18-8 stainless steel material offers superior resistance to rust and corrosion, making it suitable for applications in moist or chemically aggressive settings. Its coarse UNC thread and Class 2A fit provide quick, secure fastening with high repeatability, reducing assembly time and minimizing the risk of cross-threading. The smooth hex head facilitates straightforward torque application, while the extended shoulder length acts as a precise axle or pivot in assemblies such as conveyor systems, robotic arms, and automotive fixtures. This design ensures minimal vibration and optimal component positioning, enhancing overall equipment durability and performance.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with Class 2A tolerance for precise fit, a shoulder diameter of 3/8" (tolerance: -0.004" to 0"), and shoulder length of 2 1/8" (tolerance: -0.005" to 0.005"). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.