S-8077A496 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 extended service life
- Enhanced durability and wear resistance from the Black Oxide finish, providing added protection against abrasion
- Precise alignment and reduced assembly wear due to the Class 3A thread fit, ensuring tight tolerances and reliable performance
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
- Secure, non-slip fastening enabled by the knurled head texture and 5/64" hex drive for easy installation and removal
- Accurate component positioning thanks to the 13/16" shoulder length with tight tolerances, minimizing play in assemblies
- Compliance with environmental and safety standards, including RoHS 3 and REACH, for use in regulated industries
Professional Applications & Engineering Value
This 4-40 UNC Thread 316 Stainless Steel Black Oxide Shoulder Screw is engineered to address critical challenges in precision machinery, automotive, and aerospace sectors. The Class 3A thread fit ensures minimal backlash and vibration, reducing the risk of loosening in high-stress environments. Its corrosion-resistant 316 Stainless Steel material, combined with the Black Oxide finish, provides exceptional protection against moisture, chemicals, and wear, making it suitable for outdoor or corrosive settings. The 13/16" shoulder length with precise tolerances allows for accurate alignment of moving parts, such as in bearings, linkages, or pivots, enhancing overall system reliability and reducing maintenance needs. This screw is ideal for applications requiring high shear strength and consistent performance under dynamic loads.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 3A fit for high precision and tight tolerances. Key dimensions include a thread size of 4-40, shoulder diameter of 1/8" (tolerance: -0.004" to -0.002"), and shoulder length of 13/16" (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 global industrial use.
