The AS O-ring Size Chart has a column that shows the Nominal Size along- side the Actual Size. List of o-ring cord sizes and available materials. All Seals is a world leader in supply of high quality o-rings, seals, engineered rubber and plastic products which serves the sealing needs of clients since 1958. D Special O-Rings D.1 Isolast® (FFKM) O-Rings D.2 FEP/PFA encapsulated O-Rings D.3 PTFE O-Rings D.4 Polyurethane O-Rings D.5 Fleximold™ O-Rings - large dimensions D.6 Round cord rings (butt vulcanized) D.7 O-Ring surface finishing 115 Back-up Rings 117 E General Information 118 118 119 120 F Back-up Ring Types F.1 Overview. Technical Handbook O-rings Lower compression set values indicate improved remaining seal capacity. Compression set values generally increase with increased temperature and time. For O-rings the minimum squeeze should be about.007 inch. The reason is that with a very light squeeze almost all elastomers quickly take 100% compression set. And thus prolong the service life of O-rings. The Parbak® numbers correspond to the size designa-tions of the 2-xxx series of the Parker O-rings they are installed with (e.g. 8-211, N 300-90 fits O-ring 2-211, N 674-70). ParCoat® Coating O-rings with ParCoat ® coatings can be assembled with low exertion of force using automatic equipment.

1. O Ring Slot Chart Actual
2. O Ring Groove Size Chart Pdf

U.S. and Metric O-Ring Sizes, Quad-Ring Seals, Rubber X-Ring Seals, Rubber Square-Ring Seals

The proper o-ring size is a fundamental aspect of proper o-ring performance. Whether your application conforms to U.S., Japanese JIS, British BS, or Common Metric sizing for o-rings, these o-ring size charts will help you locate the right o-ring size. If the o-ring, quad-ring, x-ring or square-ring you need doesn't fit these standards, custom and non-standard products are available for most materials with no tooling or setup fees.

You can contact us or request a quote online to quickly and easily order o-rings, x-rings, square-rings or other non-standard products.

STANDARD O-RING SIZES CHARTS

STANDARD X-RING SIZES CHARTS

STANDARD SQUARE RING SIZES CHARTS

Standard O-Ring Size Chart

Download the O-Ring Size Chart to view standard sizes (O-rings are measured in millimeters).

How to Measure O-Rings

O-Rings are one of the most common types of seals in the world. With an unlimited number of possible manufacturing sizes, they are used various applications across industries. These round mechanical seals keep gas or liquid from passing through an opening but over time, they may wear out and require replacement. If you’re planning to replace an O-ring, a good fit is critical for successful sealing.

Below are the steps to take to properly measure for a new or replacement O-Ring.

• Place the O-ring on a clean, flat, level surface.
• Determine the inside diameter by using a ruler to measure from one inner edge to another.
• Use a ruler to measure the diameter, from one outer corner of the O-ring to the other outer corner.
• Finally, measure the cross-section. Place the O-ring into a vernier caliper. Lightly clamp the jaws of the caliper onto the O-ring, but do not compress it. Record the thickness of the ring (the cross-section, see image for reference).

More Resources and Quick Links

O Ring Slot Chart Actual

• Shop our selection of popular brand O-Rings, like Alfas, Buna, EPR, Viton, and more!
• Check out this post, A Simple Guide to Selection an O-ring for more detailed information.
• Need Parker O-Ring Sizing Gauges? We have those!
• Complete your set up with the Parker O-Ring Installation and Extraction Tools

O Ring Groove Size Chart Pdf

For more information about O-ring sizes, applications, or orders, contact our team!