3/4"-16 18-8 Stainless Nylon Insert Lock Nuts (2 pcs.)

Diameter: 3/4"
Diameter 2: 1-7/32"
Thickness: 7/8"
Material: Stainless Steel
Driver Type: 1-1/8" Wrench
Thread Size: 16 (Fine)
Hardness: 18-8
Style: Waxed Nylon Insert
Type: Lock Nut

Box of 2.

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