S-8077A663 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
- Superior corrosion resistance with 316 stainless steel construction and black oxide finish, ideal for harsh industrial environments
- Precision thread engagement with Class 3A UNC threads ensuring reliable fastening and vibration resistance
- High mechanical strength delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Secure anti-rotation design featuring knurled head texture and hex socket drive for stable tool engagement
- Accurate shoulder positioning with controlled diameter and length tolerances for precise component alignment
- Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations (RoHS/REACH)
- Optimized for industrial use with coarse threading for rapid assembly and disassembly in maintenance operations
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw with black oxide finish provides exceptional corrosion resistance in chemical processing, marine, and outdoor equipment applications. The Class 3A UNC thread specification ensures precise fitment in industrial machinery, while the knurled socket head prevents slipping during torque application. Engineered with a 70,000 psi tensile strength, it maintains structural integrity under heavy loads and vibration, making it ideal for precision alignment in rotating assemblies, pivoting mechanisms, and bearing retention systems. The combination of corrosion-resistant materials and high-strength performance reduces maintenance frequency and extends service life in demanding operational environments.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit and precise shoulder dimensions (diameter tolerance: -0.004" to -0.002", length tolerance: -0.005" to 0.005"). Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features 1/4"-20 UNC coarse threads with right-hand direction and standard shoulder fit for consistent performance across industrial applications.
