S-91273A154 1/4"-20 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 longevity in harsh industrial environments
- Precise component alignment ensured by the 3/8" shoulder length with tight ±0.005" tolerance
- High-torque installation capability through knurled hex socket head design preventing tool slippage
- Reliable thread engagement with Class 2A UNC coarse threads for quick assembly and vibration resistance
- Exceptional mechanical strength delivering 70,000 psi tensile strength for heavy-duty applications
- Consistent performance maintained through Rockwell B55 hardness and 35,000 psi shear strength
- Global compliance readiness with RoHS 3 and REACH environmental regulations
Professional Applications & Engineering Value
This socket head shoulder screw solves critical alignment challenges in precision assemblies where rotational components must maintain exact positioning. The 18-8 Stainless Steel construction provides inherent corrosion resistance for food processing, marine, and chemical exposure applications. The 3/8" shoulder length with controlled diameter tolerance acts as a precise pivot point or bearing surface in machinery, eliminating the need for additional bushings. The knurled hex socket drive ensures secure tool engagement during high-torque installation, while the UNC coarse threads facilitate rapid assembly in production environments. These shoulder screws deliver engineering value by reducing component count, minimizing wear in rotating assemblies, and maintaining dimensional stability under load.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and shoulder diameter tolerance of -0.004" to -0.002". Features 1/4"-20 UNC coarse threads with 3/8" thread length and standard shoulder fit. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Mechanical properties include Rockwell B55 hardness and 70,000 psi tensile strength for reliable performance in industrial applications.
