S-97345A639 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
- Exceptional mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing applications
- Precision Class 3A thread fit ensures tight tolerances and secure fastening in high-vibration assemblies
- Knurled head with hex socket drive provides superior grip and torque transmission during installation
- Standardized shoulder dimensions maintain consistent alignment and spacing in rotating mechanisms
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for quality assurance
- Coarse UNC threading enables quick assembly and reduced cross-threading risks in production environments
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw delivers critical engineering value in precision assembly systems where corrosion resistance and dimensional stability are paramount. The Class 3A thread fit maintains exacting tolerances for applications requiring minimal backlash in rotating components, while the knurled socket head prevents tool slippage during high-torque installation. The UNC coarse thread profile accelerates assembly line operations while the standardized shoulder diameter provides consistent bearing surfaces in machinery, automation equipment, and precision instruments. Engineered to withstand demanding conditions, this fastener solves common industrial challenges including galvanic corrosion, vibrational loosening, and misalignment in mechanical systems.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit ensuring precision tolerance control. The shoulder features diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" for consistent dimensional accuracy. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming hazardous substance restrictions are met for industrial applications worldwide.
