S-91273A233 1/2"-13 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
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
- Precise alignment and smooth rotation ensured by the 2-1/4" shoulder with tight diameter and length tolerances
- Easy installation and removal with knurled socket head and 1/4" hex drive, providing excellent grip
- Reliable coarse thread engagement with UNC Class 2A fit for quick assembly and vibration resistance
- Consistent performance backed by Rockwell B55 hardness for durability under repeated use
- Environmental compliance meeting RoHS 3 and REACH standards for safe, sustainable manufacturing
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and mechanical stress challenges in industrial assemblies. The 2-1/4" precision shoulder provides a stable bearing surface for rotating components like gears, pulleys, and linkages, minimizing wear and maintaining concentricity. Its 1/2"-13 UNC coarse threads ensure rapid installation and secure fastening in machinery, automotive, and conveyor systems, while the knurled socket head with hex drive allows for high-torque application without slippage. The combination of 70,000 psi tensile strength and corrosion-resistant material makes it ideal for applications requiring both structural integrity and longevity in demanding environments.
Specification Summary & Compliance
This shoulder screw features Class 2A thread fit with UNC coarse threading (1/2"-13) and precise shoulder dimensions (diameter tolerance: -0.004" to -0.002", length tolerance: -0.005" to 0.005"). Manufactured to industrial standards using 18-8 stainless steel, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability for global supply chains.
