S-94731A820 1/4"-20 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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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 mechanical stress.
- Precision UNC coarse threading with Class 2A fit for quick assembly and secure fastening in high-vibration applications.
- Durable Rockwell B55 hardness provides excellent wear resistance and long service life.
- RoHS 3 and REACH compliance guarantees environmental safety and regulatory adherence for global supply chains.
- Generous 2-1/4" shoulder length offers stable alignment and support for rotating components like gears and pulleys.
- External hex drive design allows for easy installation and removal with standard tools, reducing assembly time.
Professional Applications & Engineering Value
This 1/4"-20 UNC shoulder screw is engineered to address critical challenges in industrial machinery and precision equipment. The 18-8 stainless steel material resists rust and corrosion, making it suitable for applications exposed to moisture, chemicals, or outdoor conditions. Its coarse thread and Class 2A fit ensure rapid, secure fastening in high-vibration settings, such as automotive assemblies, conveyor systems, and robotic arms. The extended shoulder length provides precise alignment for bearings, linkages, and rotating parts, reducing wear and minimizing maintenance downtime. With a 70,000 PSI tensile strength and 35,000 PSI shear strength, it delivers reliable performance in heavy-duty mechanical systems, enhancing operational safety and longevity.
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 2-1/4" (tolerance: -0.005" to 0.005"). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial use.
