S-97768A144 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 18-8 Stainless Steel construction and Black Oxide finish, ideal for harsh industrial environments.
- Enhanced durability and wear resistance from Rockwell B55 hardness, ensuring long service life under repetitive use.
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance in demanding applications.
- Precise alignment and reduced wear thanks to the 1/8" shoulder diameter and 1" shoulder length with tight tolerances.
- Secure and easy installation using a hex drive (5/64") and knurled head, preventing slippage during assembly.
- Consistent thread engagement with Class 3A fit and 4-40 UNC coarse thread, minimizing the risk of cross-threading.
- Compliance with environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries.
Professional Applications & Engineering Value
This 18-8 Stainless Steel shoulder screw is engineered to address common challenges in precision assemblies, such as misalignment and component wear. The 1" shoulder length and 1/8" shoulder diameter provide a stable pivot or spacer, reducing friction and extending the life of moving parts in machinery, automation systems, and electronic enclosures. The Black Oxide finish enhances corrosion resistance, while the 4-40 UNC coarse thread and Class 3A fit ensure reliable fastening in high-vibration environments. With a hex drive and knurled head, it offers secure torque application, making it ideal for applications requiring repeated adjustments or disassembly.
Specification Summary & Compliance
This shoulder screw features precise dimensions, including a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". It adheres to UNC thread standards with a Class 3A thread fit for high precision. Manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and suitability for global industrial use.
