BBMTA Replacement Trailer Brake Backing Plate Flange 2.27" for 3500# Axle, 4 Hole Bolt Square Bracket (2pack

2.27" 4 HOLE bolt square bracket Used on 2000# and 3500# LB axles, Must be welded on, Measures 3-3/4" wide, 1/4" Thick, 2.27" Inner Hole Diameter, Takes 7/16" Bolts、Bolt Hole Size 1/2", Approximately 2-7/8" spacing (measured from center of mounting holes to the next) or 4" hole spacing measure across, diagonally, Most modern 7" and 10" Electric Drum brakes use the same standard 4 bolt square flange. (7" brakes are used on 2000# axles, 10" brakes are used on 3500# Axles)