Radial Ball Bearing, Double Shielded, 30 mm Bore Dia., 62 mm Outside Dia./ OVERALL WIDTH: 16.0 MILLIMETERS NOMINAL BORE DIAMETER: 30.0 MILLIMETERS NOMINAL OVERALL OUTSIDE DIAMETER: 62.0 MILLIMETERS NOMINAL SURFACE FINISH: GROUND SHIELD QUANTITY: 2 LOAD DIRECTION: RADIAL BORE SHAPE: STRAIGHT INTERNAL FIT-UP DESIGNATION: STANDARD STANDARD TOLERANCE DESIGNATION: ABEC NO.1 LUBRICATION MATERIAL: GREASE LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-18709 MIL SPEC SINGLE MATERIAL RESPONSE MATERIAL: STEEL OVERALL STYLE DESIGNATOR: 10A NON-LOADING GROOVE, NON-SEPARABLE