0.5"ID x 1.003"OD x 0.059"Thick White PTFE Flat Washer / CROSS-SECTIONAL SHAPE STYLE: 35 RECTANGULAR OUTSIDE DIAMETER: 0.9970 INCHES MINIMUM AND 1.0030 INCHES MAXIMUM CENTER HOLE SHAPE STYLE: 42 ROUND DIAMETER: 0.5050 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM OVERALL THICKNESS: 0.0570 INCHES MINIMUM AND 0.0630 INCHES MAXIMUM LUBRICATION MATERIAL: LUBRICANT, MANUFACTURERS STANDARD CORNER SHAPE: SQUARE ALL CORNERS MATERIAL: PLASTIC OVERALL STYLE DESIGNATOR: 23 ROUND