S-94383A450 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 Load-Bearing Capacity: With a tensile strength of 140,000 psi and shear strength of 84,000 psi, this screw reliably handles high-stress applications without failure.
- Precision Thread Fit for Secure Fastening: Class 3A thread fit ensures tight, vibration-resistant connections, reducing the risk of loosening in dynamic environments.
- Corrosion-Resistant Black Oxide Finish: Enhances durability and provides a protective layer against rust, extending service life in harsh industrial conditions.
- Knurled Head for Improved Grip: The knurled socket head design allows for easy installation and removal, even with gloved hands, boosting assembly efficiency.
- Accurate Shoulder Diameter for Alignment: The 1/2" shoulder diameter with tight tolerances ensures precise component positioning and smooth rotational movement.
- High-Strength Alloy Steel Construction: Offers Rockwell C32 hardness for wear resistance and long-term reliability in demanding mechanical setups.
- Compliance with Industry Standards: Meets ASME B18.3, RoHS 3, and REACH regulations, ensuring safety, environmental responsibility, and global acceptance.
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw is engineered to address common industrial challenges, such as misalignment and component wear in machinery. The alloy steel material, combined with a black oxide finish, provides superior resistance to corrosion and abrasion, making it ideal for precision applications like pivots, axles, and guides in automotive or manufacturing equipment. The Class 3A thread fit and knurled head enhance installation ease and vibration resistance, reducing maintenance downtime. By ensuring consistent performance in high-load scenarios, this screw supports efficient assembly and extends the lifespan of industrial systems.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit and UNC coarse thread standards, with precise dimensions including a shoulder diameter of 1/2" (tolerance: -0.004" to -0.002") and shoulder length of 3/4" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) for environmental safety.
