S-97832A276 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
- Exceptional corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
- Superior strength and reliability with a 70,000 psi tensile strength and 35,000 psi shear strength, ensuring components stay securely fastened under high stress.
- Precise component alignment and reduced wear thanks to the 3/8" shoulder diameter with tight tolerances, providing a stable bearing surface.
- High-durability performance backed by a Rockwell B55 hardness, resisting deformation and maintaining integrity in demanding applications.
- Secure and efficient installation with a hex socket drive and knurled head, preventing cam-out and allowing for high-torque tightening.
- Reliable thread engagement from the Class 3A UNC coarse thread, offering superior fatigue resistance and vibration resistance.
- Guaranteed quality and safety through compliance with ASME B18.3, RoHS 3, and REACH, ensuring regulatory adherence for industrial use.
Professional Applications & Engineering Value
This 5/16"-18 UNC shoulder screw is engineered to solve critical alignment and pivot point challenges in industrial machinery, automation systems, and precision assemblies. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it suitable for demanding environments like food processing or outdoor equipment. The precision-machined 3/8" shoulder diameter acts as a reliable axle or locating dowel, eliminating the need for additional bushings and reducing assembly complexity. Combined with the Class 3A thread fit and coarse thread spacing, it ensures robust, vibration-resistant connections that maintain accuracy and reduce maintenance downtime in high-cycle applications.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit for precise engagement, manufactured to UNC thread standards. The shoulder diameter tolerance is held to -0.004" to -0.002", and the shoulder length tolerance is -0.005" to 0.005", ensuring high dimensional accuracy. It is produced in accordance with the ASME B18.3 specification and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
