Diameter: #10
Diameter 2: 13/32"
Thickness: 3/16"
Material: Steel
Finish: Zinc
Driver Type: 3/8" Wrench
Thread Size: 24 (Coarse)
Hardness: Grade 2
Style: Thin Pattern Nylon Insert
Type: Lock Nut

Box of 10.

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