1/2"-20 Chrome Plated Steel Fine Thread Thin Pattern Lock Nuts

Diameter: 1/2"
Diameter 2: 27/32"
Thickness: 11/32"
Material: Steel
Finish: Chrome
Driver Type: 3/4" 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.