S-90298A709 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
- Exceptional corrosion resistance with 18-8 stainless steel and passivated finish, ensuring long-term reliability in harsh environments.
- Precise alignment and reduced assembly wear due to the 1/2" shoulder diameter with tight tolerance (-0.001" to 0.001"), maintaining component positioning.
- High tensile strength of 70,000 psi and Rockwell B55 hardness for reliable performance under heavy loads and repeated use.
- Secure, non-slip fastening enabled by the knurled head and 1/4" hex drive, allowing for easy installation and removal with standard tools.
- Consistent thread engagement with Class 3A UNC coarse threads, providing superior fit and vibration resistance in dynamic applications.
- Compliance with industry standards including ASME B18.3, RoHS, and REACH, ensuring safety and environmental responsibility.
- Versatile right-hand thread design for broad compatibility in machinery, automotive, and industrial assemblies.
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw is engineered to address common industrial challenges such as misalignment, component wear, and corrosion. The 18-8 stainless steel construction, combined with a passivated finish, offers excellent resistance to rust and chemicals, making it ideal for demanding environments like automotive systems, machinery linkages, and precision instruments. The 1/2" shoulder diameter provides a stable bearing surface, reducing stress on connected parts and extending service life. With a Class 3A thread fit and coarse thread spacing, it ensures quick assembly and reliable performance in high-vibration settings, supporting efficient production and reduced maintenance costs.
Specification Summary & Compliance
This shoulder screw features precise dimensions, including a shoulder diameter tolerance of -0.001" to 0.001" and shoulder length tolerance of -0.005" to 0.005", ensuring consistent fit. It adheres to ASME B18.3 standards for shoulder screws and includes Class 3A thread fit per UNC specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and suitability for global industrial use.
