Find the right size o-rings, quad-rings, x-rings and square-rings for your application. Custom and non-standard o-ring sizes available with no tooling or setup fees.

The standard sizes for o-rings include 20 sizes used to seal straight-thread tube fittings on a boss. A boss is a ± cylindrical projection on a casting or forging.

Full-size representations of our Standard Size O-Rings are displayed. This new version has more O-Rings illustrated, including Precision Associates’ own extended stan-dards. We debut our latest innovation with this publication - 5/32” nominal cross section O-Rings.

The following tables list approximately 2000 O-ring sizes in order by inside diameter. These O-ring sizes correspond to US Standard AS568, British Standard, Swedish, as well as many common metric sizes according to DIN and ISO standards. Most of these sizes are readily available from ERIKS stock in: Nitrile NBR 70 and 90 Shore A,

0.029 0.042 0.056 0.070 0101 0.114 0.145 0.176 0.208 0.239 0.301 0.364 0.426 0.489 0.551 0.614 0.676

The rubber compound must be added when ordering by the 2-size number (i.e., N0674-70 2-007). This chart provides dimensions for standard (AN) shrinkage materials ONLY. These correspond to AS568A dimensions. O-rings manufactured out of compounds with different shrinkage rates (other than AN) will produce slightly different dimensions and tolerances.

Click here to go to our Paintball o-ring kits product manual page (Includes our color o-ring size chart). Note: Chart must be printed at "Actual Size" or "100% scale" and not "fit to page" or "shrink to page" settings in order for printed o-ring sizing to be accurate.

Microsoft Word - Standard O-RING SIZE CHART.docStandard O-Ring Sizing Chart

AS568 dash number appears to the right of O-ring inside diameter (I.D.) and below cross sectionial diameter. Reference Only.

6.737 0.040 6.987 0.040 7.237 0.045 7.487 0.045 7.737 0.045 7.987 0.045 8.237 0.050 8.487 0.050 8.737 0.050 8.987 0.050 9.237 0.055 9.487 0.055 9.737 0.055 -201 0.171 ...