S-96126A126 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 316 stainless steel construction, ideal for harsh chemical and marine environments
- Precise component alignment with Class 2A thread fit and controlled shoulder diameter tolerance for reliable assembly
- High strength performance delivering 70,000 psi tensile strength for demanding mechanical applications
- Secure hex drive engagement with 5/64" socket head preventing cam-out during installation
- Excellent durability with Rockwell B79 hardness maintaining thread integrity under repeated use
- Environmental compliance meeting RoHS 3 and REACH standards for global manufacturing requirements
- Optimized shoulder design with 1/8" diameter and 3/8" length providing stable bearing surfaces for rotating components
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw in 316 stainless steel addresses critical alignment challenges in precision assemblies. The passivated finish enhances corrosion resistance in chemical processing equipment, while the precise shoulder diameter (1/8") with tight tolerance control ensures accurate component positioning in machinery, automation systems, and electronic enclosures. The coarse UNC threads provide rapid assembly in production environments, and the 3/8" shoulder length creates reliable pivot points in rotating mechanisms. With its socket head design and 70,000 psi tensile strength, this shoulder screw maintains structural integrity in high-vibration applications where loosening could cause equipment failure.
Specification Summary & Compliance
Manufactured to exacting standards, this shoulder screw features Class 2A thread fit per UNC specifications with precise shoulder diameter tolerance (-0.001" to 0") and shoulder length tolerance (0" to 0.002"). The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety in global manufacturing applications. The right-hand thread direction and 5/32" thread length provide optimal engagement in standard thickness materials.
