7/16"-20 Chrome Plated Steel Fine Thread Thin Pattern Lock Nuts (10 pcs.)

Diameter: 7/16"
Diameter 2: 23/32"
Thickness: 5/16"
Material: Steel
Finish: Chrome
Driver Type: 5/8" Wrench
Thread Size: 20 (Fine)
Style: Thin Pattern
Type: Lock Nut

Box of 10.

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