S-91327A193 3/8"-16 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
- Secure vibration-resistant locking with nylon patch thread locker that maintains hold in temperatures from -50° to 250°F
- Exceptional corrosion resistance through 18-8 stainless steel construction and passivated finish for harsh environments
- Precision alignment and bearing surfaces with consistent shoulder diameter and length tolerances for reliable component positioning
- High strength-to-weight ratio delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Easy installation and removal with standard hex socket drive and knurled head for superior grip during assembly
- Interchangeable compatibility with Class 3A thread fit and UNC coarse threading meeting industry standards
- Regulatory compliance assurance meeting ASME B18.3 specifications and RoHS/REACH environmental standards
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw with nylon patch locking technology provides critical solutions for precision machinery and rotating assemblies where component positioning is paramount. The 18-8 stainless steel construction combined with passivated finish ensures long-term corrosion resistance in demanding industrial environments. The precisely machined shoulder delivers consistent bearing surfaces for gears, pulleys, and linkages, while the Class 3A thread fit maintains tight tolerances in high-vibration applications. The knurled head and hex socket drive facilitate secure installation in confined spaces, making it ideal for automation equipment, manufacturing machinery, and transportation systems where reliability and repeatability are essential.
Specification Summary & Compliance
This shoulder screw features Class 3A thread fit with UNC coarse threading (3/8"-16) and maintains tight dimensional tolerances on both shoulder diameter (-0.004" to -0.002") and length (-0.005" to 0.005"). Manufactured in compliance with ASME B18.3 specifications and certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to international quality and environmental standards for industrial fastener applications.
