S-90325A152 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 and passivated finish for extended service life in harsh environments
- Precise component alignment ensured by the exact 1/8" shoulder diameter with tight tolerance for reduced assembly vibration
- High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical applications
- Reliable thread engagement with Class 2A UNC coarse threads providing secure fastening and easy installation
- Space-saving hex socket drive allowing compact installation and high torque application in confined spaces
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
- Optimized shoulder design with precise 1/4" shoulder length for accurate spacing and component positioning
Professional Applications & Engineering Value
These 4-40 UNC shoulder screws deliver exceptional engineering value in precision assemblies where component alignment and spacing are critical. The 18-8 Stainless Steel construction with passivated finish provides reliable corrosion resistance in industrial environments, while the 1/8" shoulder diameter with precise tolerance ensures perfect alignment of moving parts in machinery, reducing wear and maintenance costs. The hex socket head design enables high-torque installation in space-constrained applications, making these Class 2A thread fit shoulder screws ideal for precision instruments, automation equipment, and mechanical assemblies requiring repeatable accuracy and durability under load.
Specification Summary & Compliance
Manufactured to exacting standards with Class 2A thread fit per UNC specifications, featuring 1/8" shoulder diameter (-0.001" to 0" tolerance) and 1/4" shoulder length (0" to 0.002" tolerance). These precision shoulder screws comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.
