True Spike flat seat steel wheel adapter washers to True Spike Acorn lug nut. This washer will allow for a proper seating surface when using any True Spike Acorn lug nut, which all have 60-degree seats, with your typical dually flat wheel surface. For wheels that have a flat face where you cannot use an acorn lug nut.

Specifications:

Color: Black

Finish: Zinc Plated

Inside Diameter: 0.65" (21/32", 16.51mm)

Material: Hardened Steel

Outside Diameter: 1.35" (1-11/32", 34.29mm)

Quantity: Sold in packs of 4 

Seat: Cone/Tapered (60°) -TO- Flat

Shape: Round Style

Tapered/Ball Adapter Thickness: 0.31" (5-16", 7.87mm)