S-90337A359 2-56 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
- Exceptional strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance
- Space-saving low profile socket head allows for installation in confined spaces while providing secure hex drive engagement
- Precise shoulder fit ensures accurate alignment and smooth rotation of mounted components
- Coarse UNC threads enable quick assembly and disassembly while maintaining Class 2A thread fit accuracy
- Environmental compliance meets RoHS 3 and REACH standards for safe use across regulated industries
- Right-hand thread design provides standard directional fastening compatible with common assembly practices
Professional Applications & Engineering Value
This precision shoulder screw delivers critical engineering value in applications requiring exact component positioning and smooth rotational movement. The 18-8 stainless steel construction provides excellent corrosion resistance while maintaining the 70,000 psi tensile strength needed for demanding mechanical assemblies. The low profile socket head design enables installation in space-constrained environments common in electronics, machinery, and precision instruments. The precisely machined 1-1/4" shoulder length with tight diameter tolerance ensures accurate alignment of bearings, gears, and other rotating components, eliminating play and reducing wear. These 2-56 UNC coarse thread shoulder screws are particularly valuable in manufacturing equipment, automation systems, and medical devices where reliable fastening and precise component mounting are essential for optimal performance.
Specification Summary & Compliance
This shoulder screw features Class 2A thread fit per UNC standards with precise 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, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.
