S-97768A450 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 and Black Oxide finish, ideal for harsh industrial environments.
- Precise alignment and load distribution thanks to the 1/2" shoulder diameter and 3" shoulder length with tight tolerances.
- High mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for demanding applications.
- Reliable thread engagement with Class 3A thread fit and UNC coarse threads for secure fastening.
- Easy installation and removal using a standard 1/4" hex drive and knurled head for improved grip.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance.
- Durable performance with Rockwell B55 hardness ensuring long-term wear resistance.
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 18-8 Stainless Steel material, combined with a Black Oxide finish, provides excellent resistance to corrosion and wear, making it suitable for machinery, automotive assemblies, and precision equipment. The 1/2" shoulder diameter and 3" shoulder length ensure accurate component positioning and reduce stress on threaded sections, while the Class 3A thread fit and coarse threads offer reliable fastening in high-vibration environments. Its socket head with hex drive allows for easy access in confined spaces, enhancing installation efficiency for industrial shoulder screw applications requiring robust, long-lasting performance.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with UNC coarse threads, ensuring precise dimensional accuracy per ASME B18.3 standards. Shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005" for consistent performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity in professional use.
