S-97768A383 5/16"-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 thanks to the Black Oxide finish on 18-8 Stainless Steel, ideal for harsh industrial environments.
- Precise alignment and secure fit ensured by the Class 3A thread fit and standard shoulder fit, reducing assembly errors.
- High tensile strength of 70,000 psi and minimum shear strength of 35,000 psi for reliable performance in high-stress applications.
- Easy installation and removal with a knurled socket head and 3/16" hex drive, providing a firm grip and reducing tool slippage.
- Durable and long-lasting with Rockwell B55 hardness, maintaining structural integrity under repeated use.
- Compliance with ASME B18.3 standards ensures consistent quality and interchangeability in professional assemblies.
- Environmental and safety adherence through RoHS 3 and REACH compliance, meeting global regulatory requirements.
Professional Applications & Engineering Value
This Black Oxide 18-8 Stainless Steel shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. Its 5/16"-24 UNF fine thread and Class 3A thread fit deliver precise fastening, minimizing vibration loosening in machinery, automotive, and aerospace components. The 2" shoulder length provides stable support for rotating parts, while the knurled socket head with hex drive allows for quick, secure installation in confined spaces. Ideal for high-stress applications like precision instruments and conveyor systems, it combines corrosion resistance with high tensile strength to extend service life and reduce maintenance costs, ensuring reliable performance in demanding environments.
Specification Summary & Compliance
This shoulder screw adheres to tight tolerances, including a Class 3A thread fit for superior precision, and shoulder dimensions with diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Manufactured in accordance with ASME B18.3 specifications, it ensures consistent quality and compatibility. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental standards for global industrial use.
