Track Roller Closure Double Sealed Drive Type Hex Socket Duty Type Heavy Face Design Plain Overall Length 8 1/2 in Roller Diameter 7 in Roller Head Type Flanged Roller Material Bearing Steel Roller Width 3 in Rolling Element Rows 2 Stud Material Bearing Steel Stud Thread Size 2-1/2 In.-12 Stud Type Concentric System of Measurement Inch Bearing Type Tapered Roller Drive Location Stud Flange Diameter 7.94 in Flange Thickness 0.72 in Hex Drive Size 5/8 in