S-98190A117 3/8"-24 Cap Nuts

Key Features & Benefits at a Glance

• Vibration-resistant locking thanks to the durable Nylon 6/6 insert, preventing loosening in high-stress environments
• Enhanced durability and corrosion resistance from the Grade 2 steel construction and protective gray nylon cap
• Reliable performance up to 250°F, making it suitable for applications with elevated temperature exposure
• Precise and secure thread engagement with Class 2B thread fit and 3/8"-24 UNF fine threading for reduced risk of cross-threading
• Easy installation and removal using standard external hex drive tools, compatible with common wrenches
• Compliance with stringent environmental regulations, including RoHS 3 and REACH, ensuring safe and sustainable use
• Aesthetic and functional protection from the nylon cap, which also prevents galling and seals against contaminants

Professional Applications & Engineering Value

This Grade 2 steel cap nut with a Nylon 6/6 insert is engineered to address common industrial challenges such as vibration-induced loosening and thermal degradation. The UNF fine thread design ensures tighter tolerances and superior holding power in high-vibration applications like automotive assemblies, machinery, and electrical enclosures. The nylon insert provides consistent locking force without damaging mating threads, extending the lifespan of connected components. Its ability to withstand temperatures up to 250°F makes it ideal for engines, HVAC systems, and industrial equipment where thermal cycling is a concern. By combining robust materials with precision Class 2B thread fit, this nylon insert locknut delivers reliable performance, reducing maintenance needs and enhancing operational safety in demanding B2B environments.

Specification Summary & Compliance

This cap nut features a 3/8"-24 UNF fine thread with Class 2B thread fit for precise engagement and consistent torque performance. It adheres to standard inch system measurements, with a width of 9/16" and height of 5/8". The nut is manufactured from Grade 2 steel and includes a right-hand thread direction with an external hex drive. Compliance is confirmed with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets current environmental and safety standards for industrial fasteners.