#10-24 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts (40 pcs.)

Diameter: #10
Diameter 2: 13/32"
Thickness: 1/8"
Material: Steel
Finish: Zinc
Driver Type: 3/8" Wrench
Thread Size: 24 (Coarse)
Hardness: Grade 2
Style: Kep
Type: Lock Nut
Washer Diameter: 13/32"

Box of 40.

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