S-97345A829 1/2"-13 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 in harsh environments thanks to 316 stainless steel construction
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for heavy-duty applications
- Precise Class 3A thread fit ensures reliable engagement and vibration resistance in assemblies
- Knurled socket head provides enhanced grip for easier installation and removal with standard hex tools
- Long 2 3/4" shoulder length offers stable bearing surface for rotating components and precise alignment
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for quality assurance
- Coarse UNC threading enables faster assembly and reduced cross-threading risk in industrial settings
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw delivers critical performance advantages in demanding industrial applications where corrosion resistance and precision alignment are paramount. The Class 3A UNC thread with coarse pitch provides superior vibration resistance in machinery, automotive, and manufacturing equipment, while the knurled socket head ensures secure tool engagement during high-torque installation. The extended shoulder length serves as an accurate pivot point or spacer in rotating assemblies, reducing wear on connected components. Engineered to ASME B18.3 specifications, this industrial shoulder bolt maintains dimensional stability under heavy loads, making it ideal for precision jigs, fixtures, and mechanical linkages exposed to corrosive chemicals or marine environments.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 standards with Class 3A thread fit for precision assembly. Features include: 1/2"-13 UNC coarse thread, 5/16" hex drive, 0.875" head diameter, and Rockwell B79 hardness. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Shoulder diameter tolerance: -0.004" to -0.002"; shoulder length tolerance: -0.005" to 0.005".
