Rockwell American 10K Heavy Duty Trailer Brake Hub/Drum

Pilot:4.88" 

Spindle: #120

Bolt Pattern: 8 X 6.5"

Stud Size: 5/8"

Capacity: 6K Lbs

Drum Dimensions: 12-1/4" Diameter X 3.5" Wide

Fits Standard 12-1/4" X 3-1/2" Electric Brakes

Cupped and Studded:

JM205110 Outer Cup

JM511910 Inner Cup

5/8"-18 Studs