Diameter: 3/8" Diameter-Thread Size: 3/8"-16
Finish: Zinc Plated Material: Grade 5 Steel
Thread: Coarse Thread
Type: Serrated Flange Nut
Wrench Size: 9/16"
Notes: A lock washer is not needed with serrated flange nuts.
Nuts grip better, hold longer, require more torque to remove than to install.
The flange covers oversized holes and distributes the load over a greater area.
Zinc plating, retards the corrosion rate in a normal atmosphere.