7/8″-9 Zinc Plated Grade 8 Steel Coarse Thread Nylon Insert Lock Nuts (3 pcs.)
Diameter: 7/8″ Diameter 2: 1-7/16″ Thickness: 1″ Material: Steel Finish: Yellow Zinc Driver Type: 1-5/16″ Wrench Thread Size: 9 (Coarse) Hardness: Grade 8 Style: Nylon Insert Type: Lock Nut Box of 3. A lock nut is a nut that resists loosening under vibrations and torque.