S-8077A477 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
- Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh chemical and marine environments.
- Superior alignment and precision ensured by the Class 3A thread fit, reducing assembly errors and improving component stability.
- High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable performance under heavy loads.
- Enhanced grip and tool engagement from the knurled socket head and 5/64" hex drive, preventing slippage during installation.
- Durable, wear-resistant surface provided by the black oxide finish, offering added protection against abrasion and galling.
- Accurate shoulder dimensions with tight tolerances (e.g., shoulder length -0.005" to 0.005"), facilitating precise positioning in assemblies.
- Compliance with global regulations including RoHS 3 and REACH, ensuring safety and environmental standards are met.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, such as misalignment and corrosion-induced failure. The 4-40 UNC coarse threads with Class 3A fit provide secure fastening with minimal play, essential for applications in robotics, aerospace, and medical devices where vibration resistance is paramount. The black oxide finish enhances durability while the knurled socket head allows for easy installation in confined spaces. Its high tensile and shear strength ensures longevity in dynamic loads, making it a reliable choice for industrial shoulder screw applications that demand both precision and resilience.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. Dimensions include a shoulder diameter of 1/8" (tolerance: -0.004" to -0.002") and shoulder length of 1 3/4" (tolerance: -0.005" to 0.005"). It 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 global supply chains.
