S-94035A127 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 passivated finish, ideal for harsh environments.
- Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term performance.
- Precise alignment and spacing ensured by the 1/8" shoulder diameter with tight tolerances (-0.001" to 0") for accurate assembly.
- Easy installation and removal with a 5/64" hex socket drive, providing secure torque application without slippage.
- Wide compatibility with UNC coarse threads and Class 2A fit, ensuring consistent engagement in various industrial applications.
- Regulatory compliance meeting RoHS 3 and REACH standards, supporting safe and sustainable manufacturing practices.
- Durable smooth head design reduces friction and wear, maintaining integrity under repeated use.
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial and mechanical assemblies. The 18-8 Stainless Steel material, combined with a passivated finish, provides excellent resistance to corrosion and oxidation, extending service life in demanding conditions. The precise 1/8" shoulder diameter with minimal tolerances ensures accurate component positioning, reducing misalignment and vibration issues. With a coarse UNC thread and Class 2A fit, it offers reliable fastening in machinery, automation systems, and precision instruments, where consistent performance and high tensile strength are paramount. The socket head design with a hex drive allows for efficient installation in confined spaces, enhancing productivity and reducing assembly time.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit, ensuring dimensional accuracy and interchangeability. The shoulder diameter tolerance is tightly controlled from -0.001" to 0", while the shoulder length tolerance ranges from 0" to 0.002" for precise fits. Manufactured from 18-8 Stainless Steel with a passivated finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting environmental and safety regulations in global markets.
