S-97768A476 1/2"-13 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 construction and black oxide finish, ideal for harsh industrial environments.
- Precise alignment and secure component positioning due to the 5/8" shoulder diameter with tight tolerances for a standard fit.
- High load-bearing capacity and reliability with a tensile strength of 70,000 psi and a minimum shear strength of 35,000 psi.
- Superior thread engagement and vibration resistance provided by the Class 3A UNC coarse thread fit for right-hand applications.
- Easy installation and removal with a knurled socket head and 5/16" hex drive, preventing tool slippage.
- Long-term durability and material integrity ensured by a Rockwell B55 hardness rating.
- Compliance with global standards including ASME B18.3, RoHS 3, and REACH for safe and regulated use.
Professional Applications & Engineering Value
This 1/2"-13 UNC shoulder screw is engineered to address critical alignment and rotational stability challenges in demanding assemblies. The 18-8 stainless steel material, enhanced with a black oxide finish, provides excellent resistance to corrosion and wear, making it suitable for machinery, automotive, and aerospace applications where exposure to moisture and chemicals is common. The 5/8" shoulder diameter acts as a precise pivot or bearing surface, reducing wear on connected parts and maintaining alignment under dynamic loads. Combined with a Class 3A thread fit and coarse thread design, it ensures secure fastening in high-vibration environments, minimizing the risk of loosening. The knurled socket head with a hex drive allows for efficient torque application, streamlining maintenance and assembly processes in industrial settings.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit and UNC coarse thread standards, ensuring precise dimensional accuracy with a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Manufactured in compliance with ASME B18.3 specifications, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material restrictions adherence for industrial use.
