S-90298A748 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
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring longevity in harsh environments.
- Precise alignment and reduced wear due to the 5/8" shoulder diameter with tight ±0.001" tolerance, maintaining component stability.
- High-strength, durable performance backed by Rockwell B55 hardness, suitable for heavy-duty industrial applications.
- Secure, reliable fastening achieved through Class 3A thread fit and 1/2"-13 UNC coarse threads, minimizing loosening under vibration.
- Easy installation and removal with hex drive and knurled head, providing enhanced grip and torque application.
- Industry-standard compliance meeting ASME B18.3 specifications, ensuring interoperability and safety in machinery.
- Environmental and safety adherence with RoHS 3 and REACH compliance, supporting sustainable and regulated manufacturing processes.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial machinery, automation systems, and precision equipment. The 5/8" shoulder diameter with minimal tolerance ensures exact positioning of moving parts, reducing friction and wear. Combined with a Class 3A thread fit and coarse UNC threads, it provides robust fastening that resists vibration loosening in high-stress environments. The passivated finish enhances corrosion resistance, making it ideal for applications exposed to moisture or chemicals. Its hex drive and knurled head facilitate quick assembly and disassembly, improving maintenance efficiency in B2B technical procurement settings.
Specification Summary & Compliance
This shoulder screw features precise dimensional accuracy, including a shoulder diameter tolerance of -0.001" to 0.001" and shoulder length tolerance of -0.005" to 0.005", with a Class 3A thread fit for superior engagement. It adheres to ASME B18.3 standards for consistent quality and performance. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) ensures it meets environmental and safety regulations, supporting responsible industrial use.
