S-90337A379 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 industrial environments
- High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-lasting use
- Precise alignment and reduced wear thanks to the precisely machined 1/8" shoulder diameter with tight tolerances
- Space-saving low profile socket head allows for installation in confined spaces with a standard 5/64" hex drive
- Reliable thread engagement ensured by Class 2A UNC coarse threads for quick assembly and vibration resistance
- Compliance with global standards including RoHS 3 and REACH, ensuring safety and environmental responsibility
- Versatile 5/8" shoulder length provides consistent pivot points and spacing in mechanical assemblies
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to solve critical alignment and durability challenges in precision assemblies. The 18-8 Stainless Steel material offers excellent corrosion resistance, making it suitable for applications in machinery, electronics, and automotive sectors where exposure to moisture or chemicals is a concern. The low profile socket head design minimizes protrusion, allowing for sleek designs and easier access in tight spaces. Combined with a precise shoulder diameter and Class 2A thread fit, this screw ensures accurate component positioning, reducing wear and improving the longevity of moving parts. Its right-hand coarse threads facilitate quick installation and provide secure fastening in high-vibration environments, enhancing overall assembly reliability.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder features a diameter of 1/8" with a tolerance of -0.001" to 0" and a length of 5/8" with a tolerance of 0" to 0.002", ensuring precise fits. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for regulated industrial applications.
