S-90298A632 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 and passivated finish, ideal for harsh industrial environments.
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term performance under load.
- Precision alignment and secure pivoting ensured by the 2" shoulder length with a tight ±0.005" length tolerance.
- High-reliability threaded connection with Class 3A thread fit for superior engagement and vibration resistance in demanding assemblies.
- Easy installation and removal using a standard 3/16" hex key, complemented by a knurled head for improved grip during manual adjustment.
- Broad industry compliance meets ASME B18.3 specifications and is RoHS 3 & REACH compliant for global supply chain integration.
- Optimized for coarse-thread applications with 5/16"-18 UNC threads for faster assembly and reduced cross-threading risk.
Professional Applications & Engineering Value
This stainless steel shoulder screw is engineered to solve critical alignment and wear challenges in precision machinery. The 2" shoulder length with minimal diameter tolerance acts as a precise pivot or axle, eliminating bushing wear and simplifying assembly in rotating assemblies, linkages, and jigs. The 18-8 stainless steel material and passivated finish provide excellent resistance to oxidation and chemical exposure, making it suitable for food processing, packaging, and automotive applications. The Class 3A thread fit and coarse UNC thread ensure secure fastening in high-vibration environments, reducing maintenance downtime and improving the operational lifespan of the equipment.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with Class 3A fit and a shoulder diameter tolerance of -0.001" to 0.001". It is manufactured in compliance with ASME B18.3 specifications and is confirmed to be RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to international environmental and safety standards.
