S-90311A115 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 environments and extended service life.
- Permanent vibration resistance provided by the nylon patch thread locker, preventing loosening from -50° to 250°F.
- High-strength reliability with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications.
- Precise assembly and fit ensured by Class 3A thread fit and standard shoulder fit, reducing installation errors.
- Easy installation and grip with a knurled socket head and 5/64" hex drive, allowing for secure tool engagement.
- Durable performance backed by Rockwell B79 hardness, maintaining integrity under mechanical stress.
- Regulatory compliance with RoHS 3 and REACH standards, ensuring safe and sustainable use in industrial settings.
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw in 316 stainless steel is engineered to address critical challenges in precision assemblies, such as misalignment and vibration-induced failure. The coarse UNC thread and Class 3A thread fit provide excellent engagement in metals and plastics, while the nylon patch thread locker offers a permanent locking solution that withstands temperature fluctuations from -50° to 250°F. Commonly used in machinery, automotive, and electronics, this screw ensures reliable performance in high-stress industrial applications, thanks to its robust tensile strength and corrosion-resistant properties. The knurled socket head enhances grip during installation, reducing slippage and improving efficiency in automated or manual processes.
Specification Summary & Compliance
This shoulder screw features a 4-40 UNC thread with Class 3A precision fit, ensuring tight tolerances for reliable fastening. The shoulder diameter and length adhere to standard fits with minimal tolerances (e.g., shoulder diameter: -0.004" to -0.002"). Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety standards for industrial use, providing assurance in global supply chains.
