S-91273A648 3/8"-24 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.
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi minimum shear strength for reliable, high-load applications.
- Precise alignment and smooth rotation ensured by the standard shoulder fit and controlled diameter/length tolerances.
- Secure, non-slip installation thanks to the knurled socket head and hex drive, allowing for high torque application.
- Fine UNF thread with Class 2A fit provides excellent vibration resistance and secure fastening in precision assemblies.
- Broad regulatory compliance including RoHS 3 and REACH, ensuring safety and environmental standards are met for global supply chains.
- Versatile right-hand thread design compatible with standard tools and common assembly procedures.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical challenges in precision machinery and industrial equipment. The black oxide finish enhances corrosion resistance, reducing maintenance in humid or chemically aggressive settings. Its 3/8"-24 UNF fine thread and Class 2A fit ensure tight, vibration-resistant connections, crucial for assemblies subject to dynamic loads. The knurled socket head and hex drive prevent tool slippage, enabling efficient installation in confined spaces. Commonly used in robotics, automotive jigs, and conveyor systems, this fastener provides reliable shoulder diameter control for accurate component positioning, minimizing wear and misalignment.
Specification Summary & Compliance
This shoulder screw adheres to Class 2A thread fit per UNF standards, with shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" for precise dimensional control. It is manufactured from 18-8 stainless steel with a black oxide finish, and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.
