S-90337A165 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 industrial environments
- Precise alignment and smooth rotation due to the accurately machined shoulder with tight diameter and length tolerances
- High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, durable fastening
- Space-saving low-profile socket head with 5/64" hex drive for easy installation in confined areas
- Consistent thread engagement ensured by Class 2A thread fit and coarse UNC threading for quick assembly
- Compliance with global regulations including RoHS 3 and REACH, ensuring safe and sustainable use in various industries
- Right-hand thread design for standard installation and secure holding in dynamic applications
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 Stainless Steel material, combined with a passivated finish, provides excellent resistance to corrosion and wear, making it suitable for electronics, machinery, and automotive components. The low-profile socket head allows for compact designs without compromising accessibility, while the precisely machined shoulder ensures accurate positioning and reduces wear on mating parts. With a coarse thread and Class 2A fit, it offers reliable performance in high-vibration environments, enhancing operational efficiency and reducing maintenance needs.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. Shoulder diameter tolerance is -0.001" to 0", and shoulder length tolerance is 0" to 0.002", ensuring precise assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for industrial applications with strict environmental and safety requirements.
