S-97832A141 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 18-8 Stainless Steel construction for long-lasting performance in harsh environments
- Precise component alignment with 3" shoulder length and controlled diameter tolerances for stable assemblies
- High-strength reliability delivering 70,000 psi tensile and 35,000 psi shear strength for demanding applications
- Secure installation and removal with knurled hex socket head providing excellent grip and torque transmission
- Consistent thread engagement through Class 3A UNC coarse threads ensuring vibration resistance
- Enhanced durability with Rockwell B55 hardness maintaining structural integrity under repeated loads
- Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe industrial use
Professional Applications & Engineering Value
This 5/16"-18 UNC shoulder screw delivers exceptional engineering value in precision machinery and industrial equipment. The 18-8 Stainless Steel construction provides excellent corrosion resistance, making it ideal for food processing, chemical environments, and outdoor applications. The 3" shoulder length with tight diameter tolerances acts as a precise pivot or axle, eliminating the need for additional bushings in rotating assemblies. The Class 3A thread fit and coarse UNC threads ensure reliable fastening in high-vibration environments, while the knurled socket head allows for secure tool engagement during installation and maintenance. These features combine to create a versatile shoulder screw solution that reduces assembly time, improves alignment accuracy, and extends service life in demanding mechanical systems.
Specification Summary & Compliance
This precision shoulder screw features a 5/16"-18 UNC coarse thread with Class 3A fit for superior thread engagement. The shoulder maintains a 1/2" diameter with tight tolerances (-0.004" to -0.002") and 3" length controlled within -0.005" to 0.005". Manufactured to ASME B18.3 specifications, the fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across various industrial sectors.
