S-90298A733 3/8"-16 ASME B18.3 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
- Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and reducing maintenance costs.
- Exceptional mechanical strength offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable performance in high-stress applications.
- Precise alignment and reduced wear due to the 1/2" shoulder diameter with tight tolerances, ensuring accurate component positioning.
- Secure fastening and easy installation with a Class 3A thread fit and knurled hex socket head, providing excellent grip and torque transmission.
- Broad compatibility and interchangeability through compliance with ASME B18.3 standards and UNC coarse threading.
- Enhanced durability and longevity from Rockwell B55 hardness, resisting deformation under load.
- Environmental and regulatory safety with RoHS 3 and REACH compliance, meeting global industry requirements.
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and rotational stability challenges in machinery assembly. The 18-8 Stainless Steel material provides excellent resistance to corrosion and oxidation, making it suitable for applications in chemical processing, food machinery, and outdoor equipment. The 1/2" shoulder diameter acts as a precise pivot or bearing surface, minimizing misalignment and wear in moving parts like gears, pulleys, and linkages. Combined with a Class 3A thread fit and coarse UNC thread, it ensures quick assembly and high vibration resistance. The knurled socket head enhances tool grip, reducing slippage during installation in confined spaces. Ideal for precision industrial applications, this screw delivers reliable performance where dimensional accuracy and durability are paramount.
Specification Summary & Compliance
This shoulder screw features a 3/8"-16 UNC coarse thread with Class 3A fit for precise engagement, and a shoulder diameter of 1/2" with tolerances from -0.004" to -0.002". It meets ASME B18.3 specifications for dimensional consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial uses.
