Track Roller System of Measurement Inch Shaft Diameter 1 in Shaft Material Alloy Steel Shaft Material Grade 52100 Shaft Type Eccentric Drive Type Hex Socket Drive Location Stud Shaft Thread Size 1 In.-14 Shaft Thread Length 7/8 in Head Diameter 2 in Head Length 7/8 in Hex Drive Size 1/2 in Overall Length 4 7/8 in Standards AS 9100 ISO 9001