S-97832A292 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, ideal for harsh industrial environments and extended service life.
- Exceptional mechanical strength offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable performance under high stress.
- Precise alignment and positioning enabled by the 3/8" diameter shoulder with tight tolerances, ensuring stable component mounting.
- Easy and secure installation with a hex socket drive and knurled head, providing superior grip and preventing tool slippage.
- High-accuracy thread engagement with Class 3A UNC coarse threads, facilitating quick assembly and reducing cross-threading risks.
- Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety.
- Robust durability backed by a Rockwell B55 hardness rating, resisting wear and deformation in demanding applications.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. Its 3/8" shoulder diameter with minimal tolerance provides a stable pivot or bearing surface, essential in machinery, automation systems, and rotating assemblies where component misalignment can cause premature failure. The coarse UNC thread (5/16"-18) and Class 3A fit ensure rapid, secure fastening even in high-vibration environments, reducing installation time and improving joint integrity. The knurled head and hex socket drive offer enhanced torque application and handling, making it a reliable choice for industrial fasteners in manufacturing, automotive, and aerospace sectors requiring repeatable precision and corrosion resistance.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for high precision. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring dimensional accuracy. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial use without hazardous substances.
