S-91273A212 3/8"-16 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, ideal for harsh industrial environments
- Precise component alignment due to the 4" shoulder length with tight tolerances, reducing assembly errors
- High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for demanding applications
- Secure and efficient installation with hex socket drive and knurled head for enhanced grip and torque application
- Reliable coarse UNC threading ensuring quick assembly and reduced cross-threading risks in high-vibration settings
- Consistent dimensional accuracy with Class 2A thread fit, providing reliable performance in machinery assemblies
- Environmental and regulatory compliance meeting RoHS 3 and REACH standards for safe, sustainable use
Professional Applications & Engineering Value
This socket head shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial machinery. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it suitable for applications in humid or chemically aggressive environments. The 4" shoulder length with precise diameter control acts as a pivot or axle, ensuring accurate positioning of moving parts like gears, pulleys, and linkages. The coarse 3/8"-16 UNC thread and hex socket drive facilitate quick, secure fastening in high-vibration setups, reducing maintenance downtime. Its Rockwell B55 hardness and high tensile strength ensure durability under repetitive stress, making it a reliable choice for automation equipment, conveyor systems, and precision instruments where shoulder screws are essential for maintaining operational integrity.
Specification Summary & Compliance
This shoulder screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent engagement. Shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring precise assembly. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances for safe industrial use.
