S-91054A390 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
- Enhanced wear resistance with TiCN coating for extended service life in high-friction applications
- Superior corrosion resistance from 18-8 stainless steel construction in harsh industrial environments
- High load-bearing capacity with 70,000 psi tensile strength for demanding mechanical assemblies
- Precise component alignment through controlled shoulder diameter tolerance (-0.002" to 0")
- Secure hex drive engagement with 3/16" drive size preventing tool slippage during installation
- Reliable thread performance with Class 2A UNC coarse threads for vibration resistance
- Environmental compliance meeting RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
This precision shoulder screw delivers exceptional engineering value in applications requiring exact component positioning and rotational stability. The 18-8 stainless steel base material combined with TiCN coating creates a superior surface hardness that resists galling and wear in high-cycle machinery. The precise shoulder fit with minimal tolerance ensures accurate alignment of moving parts in assemblies, while the coarse UNC thread design maintains secure fastening under vibration. Ideal for industrial automation equipment, precision instruments, and rotating assemblies where dimensional accuracy and long-term durability are critical. The combination of Rockwell B55 hardness and controlled shoulder dimensions makes this fastener particularly valuable in applications requiring repeated disassembly and reassembly.
Specification Summary & Compliance
Manufactured to exacting standards with Class 2A thread fit per UNC specifications, ensuring proper engagement and interchangeability. The shoulder diameter maintains tight tolerance of -0.002" to 0" with shoulder length controlled within 0" to 0.003" for precision applications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting international industrial safety requirements. The 5/16"-18 UNC thread with coarse spacing provides reliable performance in various industrial fastening scenarios.
