S-97345A662 5/16"-18 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 industrial environments and chemical exposure
- Enhanced assembly precision with Class 3A thread fit and tight shoulder tolerances (±0.005"), ensuring reliable alignment and reduced vibration
- High mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for demanding applications and heavy loads
- Secure, non-slip installation thanks to the knurled head and hex socket drive, preventing tool slippage during torque application
- Optimized for coarse-thread applications with 5/16"-18 UNC threads, providing faster assembly and better performance in softer materials
- Long-term durability from Rockwell B79 hardness, maintaining structural integrity under repeated stress and wear
- Full regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use and environmental safety
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical alignment and corrosion challenges in precision machinery, rotating assemblies, and pivot mechanisms. The 15/16" shoulder length with minimal tolerance variation provides a stable bearing surface, eliminating misalignment and reducing bushing wear. Combined with coarse UNC threads and Class 3A fit, it ensures rapid, secure fastening in high-vibration environments like automotive fixtures, conveyor systems, and packaging equipment. The knurled socket head enhances grip during installation, while the corrosion-resistant 316 alloy withstands moisture, chemicals, and temperature fluctuations, extending service life in demanding industrial settings.
Specification Summary & Compliance
This shoulder screw maintains Class 3A thread fit per UNC standards with a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of ±0.005". It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring both dimensional accuracy and material safety for industrial applications.
