S-97345A676 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 316 stainless steel construction, ideal for harsh industrial environments and extended service life.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance in heavy-duty applications.
- Precise alignment and smooth rotation ensured by the precision-ground shoulder with tight diameter and length tolerances.
- High-reliability thread engagement with Class 3A fit UNC coarse threads for secure fastening and vibration resistance.
- Easy installation and removal using a standard 3/16" hex key, complemented by a knurled head for improved grip.
- Compliance with major industry standards including ASME B18.3, ensuring dimensional consistency and interchangeability.
- Environmentally responsible manufacturing with full compliance to RoHS 3 and REACH regulations.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to provide a robust and precise pivot, shaft, or spacer in demanding assemblies. Its UNC coarse thread and Class 3A thread fit ensure rapid assembly and high resistance to loosening under vibration, which is critical in machinery, automotive, and conveyor systems. The large 1 7/8" shoulder length with minimal tolerance offers a stable bearing surface, reducing wear on mating parts. The knurled socket head allows for tool-free initial positioning and secure hex drive engagement. Made from corrosion-resistant 316 stainless steel, it performs reliably in corrosive environments, making it a versatile industrial fastener for long-term applications.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with a Class 3A fit for precision. The shoulder diameter is 3/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 1 7/8" with a tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant.
