O Ring Measurement Guide

Originally the nominal size was just for a listing of the approximate fractional dimensions of the o ring.

O ring measurement guide.

This o ring size chart can help you find the as568 size o ring or the metric sizing of standard size o rings. Prior to the common use of dial calipers many people called out a 1 inch by 1 1 4 rt o ring this was a dash 214. This as568 o ring chart is a sae size standard for o rings and shows as568 rev b or as568b o ring sizes which supersedes as568 rev a or as568a o ring dimensions. That document published by the society of automotive engineers sae lists the sizes of o rings in six series or groups in both inches and millimeters.

Printable paper strip. Until now o ring standards have left a gap between the 1 8 and 3 16 nominal cross sections. Nominal cross section o rings. M seals specialises in seals for industrial use.

Metric o rings and custom size o rings are often used when a standard o ring size will not fit an application or existing hardware. Please contact us if you are looking for a size not shown in the 5 32 group. Place the ring over the circles lining up the inside edges of the ring to the circle that best matches on the ring size chart. 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.

The proper o ring size is a fundamental aspect of proper o ring performance. Popular o ring size standards include usa s as568 o ring size chart the uk s bs 1806 o ring sizing chart and japan s jis b 2401 o ring size list. O ring size chart of standard sizes of o rings in as 568 and bs 1806 iso 3601 metric sizes o rings in nbr silicone viton rubbers. The standard sizes used by o ring manufacturers in the united states are defined by aerospace standard as568b aerospace size standard for o rings.

The as o ring size chart has a column that shows the nominal size along side the actual size. To make sure it s printed to actual size choose scale 100 when selecting your print options. O ring size charts note. We have millions of as568 o rings in stock which can be purchased easily through our o rings online store.

The safe choice for seals and moulded parts used in hydraulics pneumatics precision engineering food medical industries oil gas valve pump and aerospace. From the finest precision seals to the.