S-8077A654 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
- Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and extended service life.
- Enhanced durability and wear resistance from the Black Oxide finish, providing a protective layer against abrasion.
- High-strength performance with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliability in heavy-duty applications.
- Precise and secure fit due to the Class 3A thread fit, minimizing the risk of loosening under vibration.
- Easy installation and removal with the hex socket drive and knurled head, allowing for better grip and torque application.
- Versatile coarse threading (UNC) for quick assembly and disassembly in various industrial settings.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This 1/4-20 UNC shoulder screw is engineered to address critical challenges in industrial assemblies, such as maintaining alignment and bearing rotational loads. Made from 316 Stainless Steel, it offers exceptional resistance to corrosion from chemicals, moisture, and saltwater, making it ideal for marine, chemical processing, and outdoor equipment. The Black Oxide finish not only enhances aesthetics but also reduces friction and galling during installation. With its coarse UNC threading and Class 3A fit, it ensures tight tolerances and reliable performance in high-vibration environments like machinery, automotive, and aerospace systems. The knurled head and hex drive facilitate secure handling, reducing assembly time and improving efficiency in production lines.
Specification Summary & Compliance
This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for superior accuracy and a shoulder diameter tolerance of -0.004" to -0.002". It conforms to ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it meets environmental and safety regulations for industrial use.
