S-90337A385 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, ensuring long-term reliability in harsh industrial environments
- Precise component alignment through the 1-1/4" shoulder with tight diameter tolerance (-0.001" to 0") for accurate mechanical positioning
- Enhanced durability with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Space-saving installation with low profile socket head design, ideal for compact assemblies
- Secure fastening performance with Class 2A thread fit and coarse UNC threads for reliable engagement
- Easy installation and removal using standard 5/64" hex drive tools
- Compliance with environmental regulations including RoHS 3 and REACH for global industrial applications
Professional Applications & Engineering Value
This precision shoulder screw delivers exceptional engineering value in alignment-critical applications where component positioning accuracy is paramount. The 18-8 Stainless Steel material provides excellent corrosion resistance for demanding environments, while the precisely machined shoulder with tight diameter tolerance ensures components maintain exact positioning without slippage. The low profile socket head design allows for space-constrained assemblies in machinery, automation systems, and precision instruments. With 4-40 UNC coarse threads and Class 2A fit, this shoulder screw offers reliable fastening in applications requiring repeated assembly and disassembly. The combination of 70,000 psi tensile strength and controlled shoulder length makes it ideal for pivot points, bearing surfaces, and precise mechanical linkages in industrial equipment.
Specification Summary & Compliance
This shoulder screw features 4-40 UNC Class 2A thread fit with precise dimensional control, including shoulder diameter tolerance of -0.001" to 0" and shoulder length tolerance of 0" to 0.002". Manufactured from 18-8 Stainless Steel with Rockwell B55 hardness and 70,000 psi tensile strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting international environmental and safety standards for industrial components.
