S-91327A170 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with integrated nylon patch thread locker prevents loosening in high-stress environments from -50° to 250°F
• Superior corrosion resistance from 18-8 stainless steel construction ensures long-term reliability in harsh industrial conditions
• Precision alignment capability with 1/2" shoulder diameter providing accurate component positioning and reduced bearing wear
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Secure installation through hex socket drive and knurled head design preventing tool slippage during torque application
• Reliable thread engagement with Class 3A thread fit ensuring consistent fastening performance and load distribution
• Industry compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw delivers exceptional engineering value through its 18-8 stainless steel construction and precision manufacturing. The 1/2" shoulder diameter provides exact component alignment in machinery, reducing wear on moving parts and maintaining operational accuracy. The integrated nylon patch thread locker addresses critical vibration-induced loosening in industrial equipment, ensuring fastener integrity across temperature extremes from -50° to 250°F. With 70,000 psi tensile strength and Rockwell B55 hardness, this heavy-duty fastener withstands substantial mechanical loads in automation systems, precision instruments, and rotating assemblies. The hex socket head with knurled texture facilitates secure tool engagement during installation in confined spaces, while the coarse UNC threads enable rapid assembly in production environments.

Specification Summary & Compliance

This shoulder screw features precision Class 3A thread fit with 3/8"-16 UNC coarse threads and maintains tight shoulder diameter tolerance of -0.004" to -0.002". The component is manufactured to ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The passivated finish on 18-8 stainless steel enhances corrosion resistance while maintaining the material's inherent strength characteristics. All dimensional and performance specifications meet industrial requirements for precision shoulder screw applications.