S-97345A640 3/8"-24 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 environments and extended service life
- Exceptional thread precision and reliability with Class 3A UNF fine threads, ensuring secure, vibration-resistant connections
- High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for demanding load-bearing applications
- Secure and easy installation featuring a knurled socket head with 1/4" hex drive, preventing tool slippage
- Accurate component alignment provided by the 1/2" diameter shoulder with tight tolerances for precise assembly
- Compliance with industry standards including ASME B18.3, ensuring consistent quality and interchangeability
- Environmental and safety compliance meeting RoHS 3 and REACH regulations for use in regulated industries
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical alignment and fastening challenges in precision machinery. The Class 3A UNF fine thread provides superior resistance to loosening under vibration, making it ideal for rotating assemblies and high-stress environments. The precisely machined 1/2" shoulder diameter acts as a pivot or bearing surface, eliminating the need for additional spacers and reducing assembly complexity. With its knurled socket head and hex drive, installation is secure and efficient, even in confined spaces. This fastener delivers reliable performance in applications such as robotics, aerospace components, and automated manufacturing systems where dimensional accuracy and corrosion resistance are paramount.
Specification Summary & Compliance
This shoulder screw features a 3/8"-24 UNF Class 3A thread with fine pitch and a shoulder diameter of 1/2" held to a tight tolerance of -0.004" to -0.002". Manufacturing and dimensional specifications conform to ASME B18.3. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets current environmental and safety standards for industrial use.
