S-8077A469 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 construction, ideal for harsh environments and chemical exposure.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable, high-stress fastening.
- Precise Class 3A thread fit ensures tight tolerances and secure mating with nuts and threaded holes, reducing the risk of loosening.
- Enhanced grip and anti-slip handling from the knurled head texture, facilitating easier installation and removal in tight spaces.
- Durable Black Oxide finish provides added corrosion protection and reduces light reflection for specialized applications.
- Wide regulatory compliance including RoHS 3 and REACH, making it suitable for global markets and sensitive industries.
- Optimized for hex drive tools with a 5/64" drive size, allowing for efficient torque application and reduced cam-out risk.
Professional Applications & Engineering Value
This 4-40 UNC thread shoulder screw is engineered to address common industrial challenges such as component misalignment, vibration-induced failure, and corrosion in demanding settings. Manufactured from 316 Stainless Steel, it offers excellent resistance to chemicals, saltwater, and extreme temperatures, making it a top choice for marine, chemical processing, and food-grade equipment. The Black Oxide finish enhances its durability while minimizing galling. The shoulder design provides a precise pivot or spacer in assemblies, ensuring accurate alignment in machinery, robotics, and precision instruments. With a Class 3A thread fit and knurled head, it delivers secure fastening and easy manual adjustment, reducing assembly time and improving overall system reliability.
Specification Summary & Compliance
This shoulder screw adheres to UNC coarse thread standards with a Class 3A thread fit for high precision. Key dimensional tolerances include a shoulder diameter of 1/8" (tolerance: -0.004" to -0.002") and shoulder length of 5/32" (tolerance: -0.005" to 0.005"). It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for regulated industries.
