Briggs & Stratton 84009870 Hex Nylon Lock Nut Stainless Steel - 5/16-18 18-8

The Briggs & Stratton 84009870 is a genuine OEM hex nylon insert lock nut (Nylock) sized 5/16"-18, constructed from 18-8 stainless steel. This fastener is designed to provide a secure, vibration-resistant connection in Briggs & Stratton engines and outdoor power equipment assemblies where corrosion resistance and reliable thread locking are required.

Key Features:

• Thread Size: 5/16"-18 (0.3125" diameter, 18 threads per inch, UNC coarse thread)
• Material: 18-8 stainless steel — offers excellent corrosion resistance and durability in harsh operating environments
• Nylon Insert Lock (Nylock): Integrated nylon collar grips the bolt threads to prevent loosening caused by engine vibration and torque cycles
• Genuine OEM Part: Manufactured to Briggs & Stratton factory specifications for a precise, guaranteed fit
• Reusable Design: Nylon insert maintains locking effectiveness through multiple removal and reinstallation cycles

Using genuine Briggs & Stratton hardware ensures your equipment maintains factory-spec integrity. The stainless steel construction makes this nut especially well-suited for applications exposed to moisture, outdoor elements, or corrosive conditions. OEM Part Number: 84009870.