S-99154A330 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, ideal for harsh environments and long-term reliability.
- Enhanced durability and strength from Rockwell B55 hardness and 70,000 psi tensile strength, reducing failure risks under load.
- Precise alignment and secure fit thanks to the 1/8" shoulder diameter with tight tolerances, minimizing component movement.
- Easy installation and space-saving design with a low-profile socket head, allowing use in confined areas with standard tools.
- Reliable thread engagement from Class 2A UNC coarse threads, ensuring consistent fastening and vibration resistance.
- Compliance with environmental standards including RoHS 3 and REACH, making it safe for regulated industrial applications.
- Versatile right-hand coarse threading for quick assembly and disassembly in various mechanical setups.
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to address common industrial challenges such as misalignment and corrosion-induced failures. Made from 18-8 stainless steel, it offers excellent resistance to rust and chemicals, extending service life in demanding settings like machinery, electronics, and automotive assemblies. The low-profile socket head design allows for compact installations without compromising on torque application, while the precise 1/8" shoulder diameter provides a stable pivot or bearing surface, reducing wear and ensuring accurate component positioning. With a Class 2A thread fit and coarse UNC threads, it delivers secure, vibration-resistant connections, making it a reliable choice for engineers seeking durability and performance in precision shoulder screw applications.
Specification Summary & Compliance
This shoulder screw adheres to Class 2A thread fit standards for consistent dimensional accuracy, with UNC coarse threading (4-40 size) and a shoulder diameter of 1/8" (tolerance: -0.001" to 0"). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.
