S-90298A895 1/2"-13 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 extended service life.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for high-stress, heavy-duty applications.
- Precise and secure assembly ensured by the Class 3A thread fit, minimizing the risk of loosening under vibration.
- Easy and non-slip installation provided by the knurled socket head and 5/16" hex drive, allowing for high torque application.
- Accurate component alignment with a precisely machined shoulder, featuring tight diameter and length tolerances for consistent performance.
- Reliable performance in demanding conditions backed by a Rockwell B55 hardness, ensuring durability and wear resistance.
- Guaranteed compliance and safety meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use.
Professional Applications & Engineering Value
This 18-8 Stainless Steel shoulder screw is engineered to solve critical alignment and fastening challenges in industrial machinery, automated systems, and precision equipment. The 1/2"-13 UNC coarse thread with a Class 3A fit provides a secure, vibration-resistant connection, while the unthreaded shoulder acts as a precise pivot or axle, eliminating the need for additional bushings. The knurled socket head with a 5/16" hex drive ensures tool grip is maintained during high-torque installation, reducing assembly time and preventing damage. Made from corrosion-resistant stainless steel, it delivers long-term reliability in environments exposed to moisture, chemicals, and varying temperatures, making it a vital component for reducing maintenance and downtime.
Specification Summary & Compliance
This shoulder screw features a 1/2"-13 UNC thread with a Class 3A fit for high precision. The shoulder diameter tolerance is -0.004" to -0.002" and the shoulder length tolerance is -0.005" to 0.005". It is manufactured in accordance with ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
