7/16"-14 Zinc Grade 8 Nylon Insert Lock Nuts (8 pcs.)

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

Box of 8.

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