S-90318A580 4-40 Shoulder Screws
Shoulder Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 stainless steel material, ideal for harsh environments like marine or chemical processing.
- High strength and durability with 70,000 psi tensile strength and Rockwell B70 hardness, ensuring reliable performance under load.
- Precise alignment and smooth rotation due to the precisely fitted shoulder with minimal diameter and length tolerances.
- Space-saving installation with an ultra-low socket head design, perfect for compact assemblies.
- Easy and secure fastening using a standard 5/64" hex drive, reducing tool slippage and installation time.
- Consistent thread engagement with Class 2A UNC coarse threads, providing reliable hold in various materials.
- Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in industrial applications.
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. Made from 316 stainless steel, it offers excellent resistance to corrosion and oxidation, making it suitable for demanding environments like medical devices, aerospace components, and food processing machinery. The ultra-low socket head and precise shoulder fit minimize protrusion and ensure accurate positioning of moving parts, reducing wear and maintenance. With a coarse thread and right-hand direction, it facilitates quick installation and secure fastening in plastics or metals, enhancing assembly efficiency and product longevity in industrial shoulder screw applications.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent engagement. The shoulder features precise diameter and length tolerances (e.g., shoulder diameter: -0.001" to 0") to ensure accurate alignment. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for industrial use without hazardous substances.
