S-94383A440 3/8"-16 ASME B18.3, ASTM A574 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 durability with alloy steel construction and Rockwell C32 hardness, ensuring long service life in demanding industrial environments.
- Superior corrosion resistance from the black oxide finish, reducing maintenance needs and extending component lifespan.
- High load-bearing capacity with 140,000 psi tensile strength and 84,000 psi shear strength, providing reliable performance under stress.
- Precise alignment and reduced wear thanks to the 1/2" shoulder diameter with tight tolerances, minimizing part movement and vibration.
- Easy installation and removal with a knurled socket head and 1/4" hex drive, allowing for secure tool grip and efficient assembly.
- Wide compatibility with 3/8"-16 UNC coarse threads and Class 3A fit, ensuring consistent engagement in various applications.
- Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards, guaranteeing safety and environmental responsibility.
Professional Applications & Engineering Value
This alloy steel shoulder screw is engineered to address common industrial challenges such as misalignment, excessive vibration, and component wear. The black oxide finish provides enhanced corrosion resistance, making it ideal for harsh environments like machinery, automotive assemblies, and heavy equipment. Its UNC coarse threads and Class 3A thread fit ensure quick, secure fastening in high-vibration settings, while the precise shoulder diameter acts as a pivot or spacer, reducing stress on connected parts. With high tensile and shear strength, it supports demanding applications where reliability is critical, from precision instruments to conveyor systems, minimizing downtime and maintenance costs.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with UNC coarse threads for precise engagement, and shoulder diameter tolerance of -0.004" to -0.002" for accurate alignment. It complies with ASME B18.3 manufacturing standards and is certified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety regulations. Made from hardened alloy steel, it meets rigorous performance criteria for industrial use.
