S-91273A572 1/4"-20 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 black oxide finish, ideal for harsh industrial environments
- Precise component alignment enabled by the 2" shoulder with tight diameter tolerance for consistent assembly performance
- High mechanical strength delivering 70,000 PSI tensile and 35,000 PSI shear capacity for demanding applications
- Secure installation and removal with hex socket drive and knurled head preventing tool slippage during torque application
- Reliable thread engagement through Class 2A UNC coarse threads ensuring vibration resistance and easy assembly
- Enhanced durability with Rockwell B55 hardness maintaining structural integrity under repeated loads
- Regulatory compliance meeting RoHS 3 and REACH standards for global manufacturing requirements
Professional Applications & Engineering Value
Engineered for precision motion control and rotational assemblies, this shoulder screw provides critical axial positioning in machinery, automotive, and automation systems. The 18-8 stainless steel material combined with black oxide finish offers exceptional corrosion resistance where lubrication or environmental exposure exists. The 2" shoulder length with controlled diameter tolerance acts as a precise shaft for bearings, pulleys, or linkages, eliminating misalignment issues. The UNC coarse threads and Class 2A fit ensure rapid assembly while maintaining vibration resistance in high-cycle applications. The hex socket drive with knurled head enables secure torque transmission in confined spaces, reducing installation errors and maintenance downtime.
Specification Summary & Compliance
This shoulder screw maintains Class 2A thread fit per UNC standards with precise shoulder diameter tolerance (-0.004" to -0.002") and length tolerance (-0.005" to 0.005"). Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring material safety and environmental responsibility. The fastener meets mechanical specifications including 70,000 PSI tensile strength, 35,000 PSI minimum shear strength, and Rockwell B55 hardness for consistent performance in industrial applications.
