S-97345A545 1/4"-20 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
- Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life.
- Superior mechanical strength offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable performance in high-stress applications.
- Precision Class 3A thread fit ensures tight tolerances and secure fastening, reducing the risk of loosening under vibration.
- Knurled socket head design provides enhanced grip for easier installation and removal with standard hex tools.
- Long 2 1/8" shoulder length with tight tolerances allows for precise alignment and acts as a pivot or shaft in assemblies.
- Compliance with global standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.
- Coarse UNC threads enable quick assembly and disassembly, improving efficiency in maintenance and production lines.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial settings, such as corrosion from chemicals or moisture and mechanical stress from dynamic loads. The Class 3A thread fit and precise shoulder dimensions ensure minimal play, making it ideal for applications requiring exact alignment, like in machinery, automotive components, and electronic enclosures. The knurled socket head enhances tool engagement, reducing slippage during torque application. With its high tensile and shear strength, this shoulder screw provides reliable performance in heavy-duty assemblies, while the coarse UNC threads facilitate faster installation, saving time in high-volume production environments.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit for precise dimensional accuracy, with a thread size of 1/4"-20 UNC and a shoulder diameter tolerance of -0.004" to -0.002". It meets ASME B18.3 specifications for consistency and reliability. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it is free from hazardous substances and suitable for global markets.
