S-90298A848 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 from 18-8 stainless steel and passivated finish, ideal for harsh industrial environments.
- Precise alignment and reduced wear with Class 3A thread fit and controlled shoulder diameter tolerance (±0.001"), ensuring reliable assembly.
- High load-bearing capacity supported by 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
- Secure, non-slip installation thanks to the knurled head and 3/8" hex drive, allowing for high torque application.
- Extended service life from coarse UNC threads and robust shoulder design, minimizing loosening under vibration.
- Broad regulatory compliance including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met.
- Versatile shoulder length of 3 1/4" with tight tolerance, providing stable pivoting or spacing in machinery.
Professional Applications & Engineering Value
This 5/8"-11 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel construction, enhanced by a passivated finish, resists corrosion in moist or chemical-exposed settings, reducing maintenance downtime. Its Class 3A thread fit and tightly toleranced shoulder (diameter: 3/4", length: 3 1/4") ensure exact positioning in rotating parts like bearings, pulleys, or linkages, preventing misalignment and wear. The coarse UNC thread and socket head with knurling facilitate quick, secure installation in high-vibration environments such as automotive, aerospace, and industrial machinery, delivering long-term reliability and performance.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit per UNC standards, with a thread size of 5/8"-11 and diameter of 0.625". Shoulder dimensions include a diameter of 3/4" (tolerance: -0.001" to 0.001") and length of 3 1/4" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications for consistency and safety, and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and health safety in industrial use.
