S-90298A855 5/8"-11 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 and passivated finish for long-term reliability in harsh environments
- Precise alignment and smooth rotation ensured by the 3/4" shoulder diameter with tight tolerance (±0.001") for reduced wear
- High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
- Secure and efficient installation using the 3/8" hex socket drive and knurled head for improved grip and torque control
- Accurate thread engagement with Class 3A UNC coarse threads for reliable fastening in high-vibration settings
- Extended shoulder length of 5" provides stable support for components like gears and pulleys
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for safety and environmental responsibility
Professional Applications & Engineering Value
This 5/8"-11 UNC shoulder screw is engineered to address critical challenges in precision machinery, such as misalignment and component wear. Made from 18-8 stainless steel with a passivated finish, it offers excellent resistance to corrosion and oxidation, ideal for industrial settings exposed to moisture or chemicals. The 5" shoulder length and precise diameter tolerance enable smooth bearing and bushing support, reducing friction and extending equipment life. With a hex socket head and knurled texture, it ensures easy installation and secure handling in automated assembly lines. Commonly used in robotics, conveyor systems, and automotive components, this screw enhances durability and operational efficiency while meeting strict ASME B18.3 specifications.
Specification Summary & Compliance
The screw features a Class 3A thread fit for high-precision applications, with UNC coarse threads (5/8"-11) and a shoulder diameter of 3/4" (tolerance: -0.001" to 0.001"). It adheres to ASME B18.3 manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
