S-91273A663 1/2"-13 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 for extended service life in harsh industrial environments
- Enhanced wear protection through black oxide finish that reduces galling and provides improved surface durability
- High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Precise component alignment with standardized shoulder diameter and length tolerances for accurate positioning
- Secure installation and removal featuring knurled head texture and 1/4" hex drive for superior grip and torque transmission
- Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent fastening performance
- Environmental compliance meeting RoHS 3 and REACH standards for safe use across regulated industries
Professional Applications & Engineering Value
This 1/2"-13 UNC shoulder screw delivers exceptional engineering value through its 18-8 stainless steel composition and black oxide finish, specifically designed to address common industrial challenges. The precision shoulder diameter with tight tolerances (-0.004" to -0.002") ensures accurate component alignment in rotating assemblies, while the coarse UNC threads provide rapid installation and vibration resistance. The knurled socket head with 1/4" hex drive prevents tool slippage during high-torque applications, making it ideal for machinery, automotive, and precision equipment where Rockwell B55 hardness maintains dimensional stability under load. The combination of 70,000 psi tensile strength and corrosion-resistant properties solves durability concerns in demanding environments while maintaining regulatory compliance.
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 shoulder length tolerance (-0.005" to 0.005"). Manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, ensuring environmental safety and regulatory adherence. The fastener delivers consistent performance through standardized UNC coarse threading and Rockwell B55 hardness specifications, providing reliable mechanical properties for industrial applications.
