S-90292A116 1/4"-20 ASME B18.3 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
- Exceptional corrosion resistance with 17-4 PH Stainless Steel construction for long-term reliability in harsh environments
- Superior load-bearing capacity with 130,000 psi tensile strength and 65,000 psi shear strength for demanding applications
- Precision alignment and reduced wear thanks to Class 3A thread fit and standardized shoulder diameter for consistent performance
- Enhanced installation control with knurled head and 5/32" hex drive for secure, slip-resistant tightening
- Wide industry compatibility through compliance with ASME B18.3 standards and UNC coarse thread design
- Environmental and regulatory safety with full RoHS 3 and REACH compliance for global supply chain integration
- Optimized for high-vibration settings with coarse 1/4"-20 threads providing strong holding power in dynamic conditions
Professional Applications & Engineering Value
Engineered for precision and endurance, this 17-4 PH Stainless Steel shoulder screw addresses critical challenges in industrial assembly and machinery. The Class 3A thread fit ensures minimal backlash and precise component alignment, reducing wear in rotating assemblies. With a 130,000 psi tensile strength and 65,000 psi shear resistance, it withstands extreme mechanical stresses in automotive, aerospace, and heavy equipment applications. The knurled socket head enhances grip during installation, preventing tool slippage in confined spaces. Its UNC coarse threads offer rapid assembly and reliable performance in high-vibration environments, while the standardized shoulder serves as a dependable pivot or spacer in precision mechanisms.
Specification Summary & Compliance
This shoulder screw maintains Class 3A thread fit per ASME B18.3 with a 1/4"-20 UNC coarse thread profile. The shoulder diameter is manufactured to a tight tolerance of -0.004" to -0.002" for consistent alignment. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. The screw meets all specified mechanical properties, including Rockwell C28 hardness, and is produced under strict quality controls for reliable performance in industrial fastening systems.
