S-8077A489 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 thanks to 316 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable performance under high-stress conditions.
- Precise Class 3A thread fit for secure, vibration-resistant assemblies and consistent engagement in critical applications.
- Enhanced grip and tool engagement from the knurled head texture and 5/64" hex drive, preventing slippage during installation.
- Durable Black Oxide finish that adds an extra layer of corrosion protection and reduces light reflection for a professional appearance.
- Compliance with major regulations including RoHS 3 and REACH, ensuring safety and environmental standards are met for global supply chains.
- Coarse UNC thread design for faster assembly and reduced cross-threading risks in various materials.
Professional Applications & Engineering Value
This 4-40 UNC thread shoulder screw is engineered to address common industrial challenges such as component misalignment, vibration loosening, and corrosion-induced failure. The 316 Stainless Steel material offers excellent resistance to chemicals and moisture, making it suitable for marine, chemical processing, and outdoor equipment. The Black Oxide finish enhances durability while the Class 3A thread fit ensures tight tolerances for precision machinery, robotics, and assembly jigs. Its knurled head and socket drive provide secure tool engagement, reducing installation time and improving workflow efficiency in automated or manual settings.
Specification Summary & Compliance
This shoulder screw adheres to UNC coarse thread standards with a precise Class 3A thread fit for high accuracy. Key dimensional tolerances include a shoulder diameter of 1/8" with a tolerance of -0.004" to -0.002" and a shoulder length of 3/16" with a tolerance of -0.005" to 0.005". The product is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for regulated industries.
