S-97768A352 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 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments
- Superior load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for heavy-duty applications
- Precision thread engagement with Class 3A fit and UNC coarse threads ensuring reliable, vibration-resistant connections
- Enhanced installation control through knurled socket head design providing superior torque transmission and slip resistance
- Rigorous quality assurance with full compliance to ASME B18.3 standards for dimensional accuracy and performance reliability
- Environmental regulation compliance meeting RoHS 3 and REACH requirements for global manufacturing applications
- Optimized shoulder design with precise diameter and length tolerances for accurate component alignment and spacing
Professional Applications & Engineering Value
Engineered for demanding industrial applications, this shoulder screw solves critical alignment and mounting challenges in machinery assembly, automation systems, and precision equipment. The 18-8 stainless steel core provides inherent corrosion resistance while the black oxide finish enhances surface durability and reduces galling. The UNC coarse threads with Class 3A fit ensure rapid assembly and maintain integrity under vibration, making them ideal for high-strength fastening in manufacturing fixtures, robotic arms, and conveyor systems. The knurled socket head design allows for secure tool engagement in confined spaces, reducing installation time and preventing damage to the drive style during high-torque applications.
Specification Summary & Compliance
This precision shoulder screw features 1/4"-20 UNC threads with Class 3A thread fit and maintains tight shoulder diameter tolerance (-0.004" to -0.002") and shoulder length tolerance (-0.005" to 0.005"). Manufactured to ASME B18.3 specifications with Rockwell B55 hardness, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe use in global industrial markets.
