S-90311A131 8-32 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
- Vibration-resistant locking with permanent nylon patch thread locker that maintains integrity from -50° to 250°F, preventing loosening in dynamic applications
- Superior corrosion resistance through 316 stainless steel construction, ideal for harsh chemical and marine environments
- Precision alignment capability with Class 3A thread fit and standardized shoulder diameter ensuring consistent component positioning
- Enhanced torque transmission via knurled socket head design providing superior grip with 3/32" hex drive tools
- High mechanical strength delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding industrial applications
- Reliable regulatory compliance meeting RoHS 3 and REACH standards for global manufacturing requirements
- Optimized installation efficiency with coarse UNC threading enabling faster assembly in production environments
Professional Applications & Engineering Value
Engineered for precision mechanical assemblies, these 316 stainless steel shoulder screws solve critical alignment and vibration challenges in industrial equipment. The Class 3A thread fit ensures precise component positioning while the nylon patch thread locker eliminates maintenance-intensive retightening in vibrating machinery. The knurled socket head provides secure tool engagement during installation, preventing cam-out in high-torque applications. Ideal for precision machinery, automotive fixtures, and electronic enclosures where corrosion resistance and dimensional stability are paramount. The standardized shoulder diameter maintains consistent pivot points and bearing surfaces in rotating assemblies, reducing wear and extending service life.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and UNC thread form. Shoulder diameter tolerance maintained at -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005". Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. Mechanical properties include Rockwell B79 hardness and minimum 35,000 psi shear strength. Thread locker performance validated across operational temperature range of -50° to 250°F.
