7/16"-14 Chrome Plated Steel Coarse Thread Nylon Insert Lock Nuts (10 pcs.)

Diameter: 7/16"
Diameter 2: 23/32"
Thickness: 15/32"
Material: Steel
Finish: Chrome
Driver Type: 5/8" Wrench
Thread Size: 14 (Coarse)
Style: Nylon Insert
Type: Lock Nut

Box of 10.

A lock nut is a nut that resists loosening under vibrations and torque.