S-97345A798 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 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 Class 3A thread fit ensures secure, vibration-resistant connections with minimal play
- Easy installation and removal with 5/16" hex socket drive and knurled head for improved grip
- Reliable shoulder alignment with controlled diameter and length tolerances for consistent component positioning
- Broad regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use
- Coarse UNC threading provides faster assembly and reduced galling in high-vibration applications
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw delivers critical performance in demanding industrial settings where corrosion resistance and mechanical integrity are paramount. The Class 3A thread fit maintains tight tolerances in high-vibration machinery, preventing loosening while the coarse 1/2"-13 UNC threads enable rapid assembly in production environments. The precision-machined shoulder provides accurate alignment for rotating components in conveyor systems, packaging equipment, and automated machinery. With Rockwell B79 hardness and 70,000 psi tensile strength, this fastener withstands extreme operational stresses while the knurled socket head ensures secure tool engagement during maintenance. Ideal for chemical processing, marine hardware, and food equipment where corrosion resistance and regulatory compliance are essential.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision. Features include: 1/2"-13 UNC coarse threads, 5/16" hex drive, 0.875" head diameter, and 3/4" thread length. Shoulder dimensions maintained within tight tolerances (-0.004" to -0.002" diameter, -0.005" to 0.005" length). Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use worldwide.
