S-97832A319 1/4"-28 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 18-8 stainless steel construction, ideal for harsh industrial environments
- Precise component alignment with 5/16" shoulder diameter and standard shoulder fit for accurate positioning
- Exceptional thread reliability through Class 3A thread fit ensuring tight, secure fastening in critical applications
- Enhanced grip and torque application with knurled socket head design preventing tool slippage during installation
- High mechanical strength delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding loads
- Industry-standard compliance meeting ASME B18.3 specifications for consistent quality and interchangeability
- Environmental regulation adherence with RoHS 3 and REACH compliance for safe, sustainable manufacturing
Professional Applications & Engineering Value
This 1/4"-28 UNF shoulder screw delivers critical engineering value in precision assembly applications where component alignment and rotational stability are paramount. The 18-8 stainless steel construction provides excellent corrosion resistance for machinery operating in demanding environments, while the Class 3A thread fit ensures vibration-resistant fastening in automated equipment, robotics, and precision instruments. The knurled socket head design allows for high-torque installation without cam-out, and the 5/16" shoulder diameter acts as a precise locating surface for bearings, gears, and linkages. These shoulder screws solve common industrial challenges of misalignment and component wear by providing a durable, precision-machined shoulder that maintains exact positioning under dynamic loads.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit precision and UNF fine thread specifications (1/4"-28). The shoulder features a diameter of 5/16" with tight tolerance control (-0.004" to -0.002") and length of 1/8" (±0.005"). This socket head shoulder screw complies with ASME B18.3 manufacturing standards and demonstrates regulatory conformity with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental directives.
