S-97345A858 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 316 Stainless Steel construction, ideal for harsh chemical and marine environments
- Exceptional mechanical strength delivering 70,000 PSI tensile and 35,000 PSI shear strength for heavy-duty applications
- Precise component alignment enabled by the 1" shoulder length with tight tolerances for reduced vibration and wear
- Reliable thread engagement with Class 3A UNC coarse threads ensuring secure fastening in high-vibration settings
- Easy installation and maintenance using standard 3/8" hex drive and knurled head for improved grip
- Long-term durability backed by Rockwell B79 hardness for sustained performance under load
- Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe global use
Professional Applications & Engineering Value
This 316 Stainless Steel shoulder screw is engineered to solve critical alignment and corrosion challenges in industrial machinery. The 1" shoulder length provides a precise bearing surface for rotating components like gears and pulleys, eliminating misalignment and reducing eccentric wear. Its UNC coarse threads and Class 3A fit ensure rapid assembly and vibration resistance in equipment such as conveyor systems, packaging machines, and automotive jigs. The socket head design with knurling allows secure tool engagement in confined spaces, while the corrosion-resistant material withstands aggressive environments including chemical processing and outdoor installations. By integrating high tensile and shear strength, this screw delivers reliable performance in demanding precision engineering applications where failure is not an option.
Specification Summary & Compliance
This shoulder screw maintains Class 3A thread fit per UNC standards with shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Manufacturing conforms to ASME B18.3 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
