S-91273A182 5/16"-18 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 through the 2 3/4" shoulder length with tight tolerances for reliable assembly
- Excellent torque transmission via the knurled socket head and 5/32" hex drive, preventing tool slippage
- High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent fastening performance
- Enhanced durability with 35,000 psi minimum shear strength for long-lasting mechanical joints
- Regulatory compliance meeting RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
This socket head shoulder screw delivers critical engineering solutions where precise rotational alignment and axial positioning are paramount. The 18-8 stainless steel construction provides exceptional corrosion resistance, making it ideal for machinery, automation systems, and assembly fixtures exposed to moisture or chemicals. The 2 3/4" shoulder length with controlled tolerances ensures accurate component spacing and smooth rotational movement in bushings, gears, and linkages. The knurled socket head with 5/32" hex drive prevents cam-out during high-torque installation, while the UNC coarse threads facilitate quick assembly in production environments. These features combine to reduce maintenance cycles and improve equipment reliability across industrial applications.
Specification Summary & Compliance
This shoulder screw features 5/16"-18 UNC Class 2A threads with coarse spacing for reliable engagement. Critical dimensions include shoulder diameter of 5/16" (-0.004" to -0.002" tolerance) and shoulder length of 2 3/4" (-0.005" to 0.005" tolerance) for precision fit. Manufactured from 18-8 stainless steel with Rockwell B55 hardness and 70,000 psi tensile strength. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and industrial use.
