S-90298A644 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 environments and reducing maintenance frequency.
- High load-bearing capacity thanks to 70,000 psi tensile strength and 35,000 psi minimum shear strength, ensuring reliable performance under stress.
- Precise alignment and smooth rotation provided by the knurled head and standard shoulder fit, minimizing component wear.
- Easy installation and removal with a hex socket drive and coarse UNC threads, saving time during assembly and disassembly.
- Consistent, secure fastening achieved through Class 3A thread fit, reducing the risk of loosening in vibrating applications.
- Durable and long-lasting due to Rockwell B55 hardness, maintaining integrity through repeated use.
- Wide industrial compatibility with compliance to RoHS 3 and REACH, meeting strict environmental and safety standards.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment and component wear in machinery. Its 5/16"-18 UNC coarse thread and Class 3A thread fit ensure quick, secure fastening in high-vibration environments, reducing downtime. The knurled head and precise shoulder diameter facilitate accurate positioning in assemblies like pivots, gears, and linkages, enhancing operational smoothness. With a Rockwell B55 hardness and robust tensile strength, it withstands heavy loads and corrosive conditions, making it ideal for automotive, aerospace, and manufacturing sectors requiring reliable industrial fasteners.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with Class 3A fit for precise tolerances, and a shoulder diameter of 3/8" with tight tolerances for consistent performance. It adheres to ASME B18.3 manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental safety and regulatory acceptance in global markets.
