S-91259A922 1/2"-13 ASME B18.3, ASTM A574 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
- Exceptional load-bearing capacity with 140,000 psi tensile strength, ideal for high-stress industrial assemblies.
- Superior corrosion resistance from the black oxide finish, extending service life in harsh environments.
- Precision shoulder fit with tight diameter and length tolerances, ensuring accurate alignment and reduced vibration.
- Reliable thread engagement with Class 3A UNC coarse threads, providing secure fastening and easy installation.
- Enhanced grip and torque application from the knurled socket head and 5/16" hex drive, minimizing slippage during tightening.
- High durability due to alloy steel construction and Rockwell C32 hardness, resisting wear and deformation.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical challenges in industrial applications where precise component alignment and high strength are paramount. The 6-1/2" shoulder length with minimal tolerances acts as a reliable pivot or axle, reducing misalignment and wear in machinery, conveyor systems, and automotive assemblies. Made from alloy steel with a black oxide finish, it offers enhanced resistance to rust and abrasion, extending the lifespan of equipment in demanding environments. The 1/2"-13 UNC coarse thread and Class 3A fit ensure quick, secure fastening, while the knurled socket head allows for efficient torque application with standard hex tools, streamlining maintenance and reducing downtime in production lines.
Specification Summary & Compliance
This shoulder screw features precise dimensions, including a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005", with Class 3A thread fit for accurate engagement. It adheres to ASME B18.3 specifications and is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and reliability for global industrial use.
