S-90251A622 3/8"-16 x 3/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant performance with permanent nylon patch thread locker that prevents loosening under dynamic loads
• Superior corrosion resistance thanks to 18-8 stainless steel construction for long-term reliability in harsh environments
• Precise Class 3A thread fit ensures secure engagement and consistent clamping force in critical assemblies
• Wide temperature tolerance (-50° to 250°F) maintains locking performance across extreme industrial conditions
• Hex drive design provides high torque transmission and reliable installation in confined spaces
• Cup tip configuration creates positive seating and minimal surface damage on shaft components
• Rockwell B80 hardness delivers excellent durability and resistance to wear in high-stress applications

Professional Applications & Engineering Value

This 18-8 stainless steel hex headless set screw addresses critical vibration-induced failure points in industrial machinery, power transmission systems, and precision equipment. The permanent nylon patch thread locker eliminates the need for secondary locking devices while maintaining consistent clamping force from sub-zero to elevated temperatures. Engineers specify this UNC coarse thread configuration for its rapid assembly characteristics and reliable performance in high-vibration environments. The headless design with hex drive enables flush mounting in space-constrained applications while providing sufficient torque capability for secure fastening. Manufactured to ASME B18.3 specifications, this set screw delivers predictable performance in demanding applications including motor mounts, gear assemblies, and rotating shaft components.

Specification Summary & Compliance

This set screw features 3/8"-16 UNC coarse threads with Class 3A thread fit for precision engagement, measuring 3/4" in length with a 0.375" thread diameter. The product complies with ASME B18.3 dimensional standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Manufacturing specifications include Rockwell B80 hardness and right-hand thread direction with cup tip configuration for optimal performance in industrial fastening applications.