S-98190A116 5/16"-24 Cap Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance with a Nylon 6/6 insert that maintains locking integrity under dynamic loads
• Reliable high-temperature performance with the nylon insert rated for continuous use up to 250°F
• Precise thread engagement thanks to Class 2B thread fit, ensuring smooth installation and reduced cross-threading risks
• Easy installation and removal with an external hex drive design for standard wrench compatibility
• Enhanced durability and corrosion protection from the steel construction and gray nylon cap
• Compliance with industrial safety standards including REACH and RoHS 3, ensuring environmental and workplace safety
• Versatile fine thread application with 5/16"-24 UNF right-hand threads for secure fastening in tight spaces

Professional Applications & Engineering Value

This Grade 2 steel cap nut with a nylon insert is engineered to address common industrial challenges such as loosening under vibration and thermal cycling. The Nylon 6/6 plastic insert provides consistent locking force, making it ideal for automotive assemblies, machinery, and electrical enclosures where reliability is critical. Its external hex drive allows for quick installation with standard tools, while the fine UNF threads offer superior holding power in high-stress applications. By combining steel strength with a high-temperature resistant insert, this lock nut ensures long-term performance in demanding environments, reducing maintenance needs and downtime.

Specification Summary & Compliance

This 5/16"-24 UNF lock nut features a Class 2B thread fit for precise tolerance and smooth assembly. It complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) standards, ensuring adherence to environmental and safety regulations. The nut is manufactured to Grade 2 strength specifications, with dimensions of 1/2" width and height, and a thread depth of 1/4".