S-90337A398 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
- Enhanced wear resistance from TiCN coating extends service life in high-friction applications
- Superior corrosion resistance with 18-8 stainless steel construction for demanding environments
- Precise component alignment through controlled shoulder diameter and length tolerances
- High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness rating
- Reliable thread engagement ensured by Class 2A UNC coarse threads for consistent fastening
- Space-saving low profile design with socket head for confined assembly applications
- Regulatory compliance with RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
This precision shoulder screw combines 18-8 stainless steel construction with advanced TiCN coating to address critical industrial challenges. The low profile socket head design enables installation in tight spaces while providing reliable torque transmission through the 5/64" hex drive. Engineers benefit from the precisely controlled shoulder diameter (1/8") and length (1") with minimal tolerances, ensuring accurate component positioning in assemblies requiring rotational or linear movement. The 4-40 UNC coarse threads with Class 2A fit deliver consistent engagement in various materials, while the right-hand thread direction maintains standard installation practices. These features make it ideal for precision machinery, automation equipment, and medical devices where dimensional stability and wear resistance are paramount.
Specification Summary & Compliance
This shoulder screw maintains Class 2A thread fit per UNC standards with precise dimensional control including shoulder diameter tolerance (-0.001" to 0") and length tolerance (0" to 0.002"). Manufactured from 18-8 stainless steel with TiCN coating, it delivers 70,000 psi tensile strength and Rockwell B55 hardness. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial suitability.
