S-93691A140 4-40 MS51576-4, NASM51576 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 alignment and reduced wear thanks to the 1/8" shoulder diameter with tight tolerance and smooth texture for accurate component positioning.
- High-strength reliability delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical applications.
- Secure fastening with coarse threads using 4-40 UNC Class 2A threads for quick assembly and vibration resistance.
- Easy installation and removal with hex socket drive (5/64") enabling high torque application in confined spaces.
- Regulatory compliance assurance meeting MS51576-4, RoHS 3, and REACH standards for safe, sustainable industrial use.
- Dimensional consistency with precise shoulder length and diameter tolerances ensuring repeatable performance in automated systems.
Professional Applications & Engineering Value
Engineered for precision alignment in industrial machinery, this shoulder screw solves critical challenges in assembly and motion control systems. The 18-8 stainless steel material, enhanced by a passivated finish, provides exceptional corrosion resistance, reducing maintenance in humid or chemically exposed environments. Its 1/8" shoulder diameter with precise fit acts as a reliable pivot or spacer, minimizing wear on moving parts like bearings and linkages. The 4-40 UNC coarse threads and Class 2A fit ensure quick, secure fastening, while the hex socket head allows efficient torque application in tight spaces. Ideal for precision equipment and automation, this screw enhances durability and reduces downtime in applications from robotics to conveyor systems.
Specification Summary & Compliance
This shoulder screw maintains Class 2A thread fit per UNC standards with precise dimensional tolerances (e.g., shoulder diameter: -0.001" to 0"). Manufactured to meet MS51576-4 specifications, it ensures consistency in high-stress environments. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms adherence to environmental and safety regulations, supporting sustainable procurement in global industrial supply chains.
