Standard AS568 O-ring
AS568-409 O-Ring, 2.475 x 0.275 in (62.87 x 6.99 mm)
The AS568-409 O-ring (dash 409, also written 2-409) has an inside diameter of 2.475 in (62.87 mm), a cross section of 0.275 in (6.99 mm), nominal 1/4 inch, and an outside diameter of 3.025 in (76.85 mm). We supply it in Buna-N (nitrile), EPDM or Silicone, in packs of 10, 25 and 100.
Size
| AS568 size | -409 |
|---|---|
| Inside diameter (ID) | 2.475 in (62.87 mm) |
| Cross section (CS) | 0.275 in (6.99 mm), nominal 1/4 in |
| Outside diameter (OD) | 3.025 in (76.85 mm) |
Rubber and pack prices
| Rubber | 10-pack | 25-pack | 100-pack |
|---|---|---|---|
| Buna-N (nitrile) 70AGood for water, air and petroleum oils; the usual choice for filter housings. | $9.99 | $23.99 | Request a quote |
| EPDM 70AGood for hot water, steam and chlorinated or chloraminated water. | $16.99 | $44.99 | Request a quote |
| Silicone 70A (orange)Good for a wide temperature range and food-contact use. | $18.99 | $52.99 | Request a quote |
A size match is not a fit claim for your equipment. Some sizes ship from stock; others have a 2-3 business day lead time before they ship. Not for oxygen, medical, aviation, scuba or other safety-critical use.