S-94383A420 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 strength and durability with 140,000 psi tensile and 84,000 psi shear strength for reliable performance in high-stress applications.
- Superior corrosion resistance provided by the black oxide finish, extending service life in demanding industrial environments.
- Precision thread engagement with Class 3A fit ensuring secure fastening and vibration resistance in critical assemblies.
- Enhanced grip and handling from the knurled socket head, allowing for easy installation and removal with standard hex tools.
- Accurate shoulder positioning featuring a 1/2" diameter with tight tolerances for precise component alignment and rotational control.
- Consistent performance backed by Rockwell C32 hardness and compliance with ASME B18.3 standards for quality assurance.
- Environmental and regulatory safety through RoHS 3 and REACH compliance, ensuring suitability for global industrial use.
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw is engineered to address common industrial challenges like misalignment, high shear loads, and corrosion. The alloy steel construction and black oxide finish provide robust protection against wear and environmental factors, making it ideal for machinery, automotive, and precision equipment. The Class 3A thread fit and knurled socket head ensure reliable fastening in vibrating systems, while the precisely machined shoulder offers stable bearing surfaces for rotating parts. By integrating high tensile strength and compliance with ASME B18.3, this screw reduces maintenance needs and enhances operational safety in demanding applications.
Specification Summary & Compliance
This shoulder screw features a 3/8"-16 UNC coarse thread with Class 3A fit for precise tolerance, a shoulder diameter of 1/2" with tight tolerances (-0.004" to -0.002"), and a thread length of 5/8". It meets ASME B18.3 specifications and is manufactured in accordance with ASTM A574. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for industrial use.
