Track Roller Closure Double Sealed Drive Type Hex Socket Duty Type Heavy Face Design Hex Socket Overall Length 1 3/8 in Roller Diameter 7/8 in Roller Head Type Flat Roller Material Stainless Steel Roller Width 1/2 in Rolling Element Rows 1 Stud Material Stainless Steel Stud Thread Size 7/16 In.-20 Stud Type Concentric System of Measurement Inch Bearing Type Needle Roller Drive Location Head