An O-ring is a solid-rubber seal shaped like a doughnut or torus. When compressed between mating surfaces, an O-ring blocks the passage of liquids or gases. Parco O-rings are available in a wide range of standard and non-standard sizes that are suitable for nearly all sealing applications. Two dimensions describe the size of an O-ring: its

nominal cross section O-Rings. Until now, O-Ring standards have left a gap between the 1/8" and 3/16" nominal cross sections. In de- signing this new group of O-Rings, we left spacing in the part numbers to allow us to add additional sizes should they be required. Please contact us if you are looking for a size not shown in the 5/32' group.

1. Choose a ring that fits the desired finger. 2. Place the ring over the circles below. Match the inside edge of the ring with the closest circle. This is the inside diameter of the ring. 3. If the ring falls between two sizes, select the larger of the two. Inside Diameter Method 1 - Paper Sizer 1. Carefully cut out the paper sizer below.

SIZE. AS568 Dimensions. AS568 is the Aerospace Size Standard for O-rings from the Society of Automotive Engineers. Simrit manufactures and supplies the 

Use our interactive size guide to determine your best size for rings, earrings, diamond carat weight, and chain length at Michael Hill Australia.

395 rows · O-Ring Size Chart Dimensions Browse in-depth charts on o-ring and sealing product

Use the dropdown menus below to help find your circumference or diameter measurement. Next, use the chart to see which ring size corresponds to your 

Small Parts - Size Chart O-Ring Sizing Chart, Laminated, 3 Sheets, Paper and Plastic Only 8 left in stock (more on the way).

Standard O-Ring Sizing Chart O-Ring Size # Actual I.D. Inches Actual C.S. Inches Nominal Reference I.D. Nominal Reference C.S. Nominal

Technical Handbook O-rings Standard O-ring Sizes (200 Series 201 to 285 cross section Diameters w = 139 ± .004 inches, w = 3,53 ± 0,10 mm Size Nominal Size Standard O-ring Size Metric O-ring Size Only (Inches) (Inches) (millimeters) AS 568A Actual Per AS 568 A Actual Per AS 568A Uniform Dash No. I.D. O.D. W.

O-Rings Standard O-rings Non-Standard O-rings O-ring Size Chart O-Ring Kits Back-up Rings Back-up Ring Size Chart Custom Molded Rubber Seals Rubber-to-Metal Bonded Machined Metal Compounds Overview Military and Aerospace Specifications