S-8077A497 4-40 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 material, ideal for harsh industrial environments and extended service life.
- Enhanced durability and wear resistance from the black oxide finish, which also reduces galling and provides a sleek, non-reflective appearance.
- High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under heavy loads.
- Precise thread engagement with Class 3A fit and UNC coarse threads, ensuring secure fastening and vibration resistance.
- Easy installation and removal using a standard 5/64" hex drive and knurled head for improved grip and torque application.
- Accurate alignment and spacing due to the consistent shoulder diameter and length, minimizing assembly errors.
- Compliance with global standards including RoHS 3 and REACH, making it safe for various international industrial applications.
Professional Applications & Engineering Value
This 4-40 UNC thread shoulder screw in 316 stainless steel with a black oxide finish is engineered to address common industrial challenges such as corrosion, misalignment, and mechanical failure. The Class 3A thread fit and coarse thread spacing provide excellent holding power in dynamic environments, reducing the risk of loosening under vibration. Its knurled head and hex drive facilitate quick, tool-friendly installation, saving time in assembly lines. Ideal for precision machinery, automotive components, and electronic enclosures, this screw ensures reliable performance where high tensile strength and environmental resistance are critical, supporting efficient maintenance and long-term operational stability.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 3A fit for precise dimensional accuracy. Key specifications include a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005", ensuring consistent performance. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for regulated industrial and electronic applications without hazardous substances.
