S-90337A157 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
- Corrosion-resistant performance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
- Precise component alignment enabled by a smooth, precisely toleranced shoulder (3/32" diameter, 5/16" length) for accurate positioning
- High-strength reliability delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical applications
- Space-saving low-profile head with 5/64" hex drive for secure installation in confined areas with standard tools
- Consistent thread engagement through UNC coarse threads with Class 2A fit, ensuring reliable fastening in industrial assemblies
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
- Right-hand thread design with coarse spacing for quick assembly and disassembly in maintenance operations
Professional Applications & Engineering Value
This low profile socket head shoulder screw solves critical alignment challenges in precision machinery, electronics, and optical equipment. The 18-8 stainless steel material combined with passivated finish provides exceptional corrosion resistance where environmental factors degrade ordinary fasteners. Engineers specify this component for applications requiring exact rotational control and axial positioning, as the precise shoulder diameter (3/32") and length (5/16") maintain consistent component spacing while the 2-56 UNC thread with Class 2A fit ensures vibration-resistant connections. The low profile socket head design allows flush mounting in space-constrained assemblies without compromising the 5/64" hex drive accessibility for secure torque application.
Specification Summary & Compliance
Manufactured to inch system standards with Class 2A thread fit tolerance for consistent engagement. Features UNC coarse threads (2-56 size) with right-hand direction and precise shoulder dimensions (3/32" diameter with -0.001" to 0" tolerance, 5/16" length with 0" to 0.002" tolerance). Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for hazardous substance restrictions.
