S-90298A859 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 construction and passivated finish, ideal for harsh industrial environments
- Precise component alignment through the 6" shoulder with tight ±0.005" length tolerance for reliable assembly positioning
- High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical applications
- Secure fastening engagement with Class 3A thread fit and coarse UNC threading for vibration-resistant connections
- Enhanced installation control via knurled socket head with 3/8" hex drive, preventing tool slippage during torque application
- Industry compliance assurance meeting ASME B18.3 specifications plus RoHS 3 and REACH environmental standards
- Minimal shoulder diameter variation with -0.001" to 0.001" tolerance for consistent bearing surface and pivot point functionality
Professional Applications & Engineering Value
This precision shoulder screw addresses critical alignment challenges in rotating assemblies, pivot mechanisms, and precision machinery. The 18-8 Stainless Steel composition with passivated finish provides exceptional corrosion resistance for food processing, marine, and chemical exposure applications. The extended 6" shoulder length with tight tolerances ensures accurate component spacing and radial support, while the Class 3A thread fit maintains secure fastening under vibration. The knurled socket head with 3/8" hex drive facilitates reliable installation in confined spaces, making these industrial shoulder bolts essential for manufacturing equipment, automation systems, and heavy-duty machinery requiring durable, corrosion-resistant precision components.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit for superior engagement. Features include 5/8"-11 UNC coarse threading, 6" shoulder length with ±0.005" tolerance, and shoulder diameter maintained within -0.001" to 0.001" tolerance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across regulated industries.
